## Please enable JavaScript to view this site.

# MDaemon Email Server 26.0

- Zoom Window Out
- Larger Text | Smaller Text
- Hide Page Header
- Show Expanding Text
- Printable Version
- Save Permalink URL

MDaemon Connector Release Notes | Scroll Prev Top Next More

MDaemon Connector Release Notes

# MDaemon Connector v8.X Release Notes

## MDaemon Connector 8.0.3 - 2026-03-17

### FIXES

- [29083] fix to Outlook doesn't let you edit the name of, or contacts in, contact groups downloaded from the server
- [29037] fix to Outlook does not show plain text body text of an iCalendar meeting invitation
- [20796] fix to attachments are not displayed in their intended order

## MDaemon Connector 8.0.2 - March 4, 2025

### FIXES

- [28275] fix to Sender header is not added when you change the From address in a composed message if there are multiple MC accounts in the profile
- [28343] fix to non-ASCII characters in the "Notes" section of a contact appear corrupt in the reading pane if you enter those characters via MD Webmail
- [3667] fix to S/MIME messages copied into an MC account may not be saved in the correct format on the server

## MDaemon Connector 8.0.1 - June 25, 2024

### FIXES

- [27840] fix to crash on 32-bit Outlook

## MDaemon Connector 8.0.0 - May 21, 2024

### CHANGES AND NEW FEATURES

- [27171] MDaemon Connector now validates the server's certificate when using SSL/TLS. If it is not valid and trusted, a message box pops up, asking whether to continue.

### FIXES

- [18363] Fix to Unable to forward a meeting request due to authentication credentials not matching the From header
- [26009] Fix to Outlook crash when sending plain text or rich text message with S/MIME signing enabled
- [26057] fix to after assigning a mail category, Sender header is adding the MC user's address
- [27277] fix to Test & Get Account Settings button may uncheck the SSL and TLS checkboxes
- [27324] fix to hang in Mail control panel app when attempting to open E-mail Accounts for a profile that's in offline mode
- [27325] fix to NDR may not be generated after message send failure for secondary MDaemon Connector account
- [27346] fix to marking a message as read or unread may fail when in offline mode
- [27278] fix to Outlook immediately bounces S/MIME encrypted emails

## MDaemon Connector 7.0.7 - May 17, 2022

### FIXES

- [25769] fix to meeting invitation may lose URL on server when opened in Outlook

## MDaemon Connector 7.0.6 - February 8, 2022

### FIXES

- [25638] fix to MC downloads same version of MC installer from MDaemon server after clicking "No" to update prompt

## MDaemon Connector 7.0.5 - November 9, 2021

### FIXES

- [21143] fix to possible tasks in both the task list and the To-Do bar are missing after restart of Outlook
- [24917] fix to "Quick Step Settings" and "Conversation Action Settings" folders not being hidden
- [24938] fix to MC converts the meeting organizer from the sender to the recipient when iCalendar format is disabled
- [25100] fix to "From" address incorrect when sending email via QuickBooks using MC
- [25114] fix to MC 64-bit crashes when changing password

## MDaemon Connector 7.0.4 - May 18, 2021

### CHANGES AND NEW FEATURES

- [24722] When MC client installer detects that Outlook 2003 or Outlook 2007 is installed, it displays a warning and aborts the installation

### FIXES

- [24328] fix to URL in comments is lost when viewing an MS Teams meeting invitation
- [24502] fix to possible Outlook hang when copying or moving messages while messages are being downloaded
- [24597] fix to possible Outlook hang when messages are saved
- [24640] fix to possible crash if a socket error occurs while downloading a message
- [24672] fix to prompt to auto-update keeps popping up after clicking No. After clicking No, auto-update prompt will occur 24 hours later if update is available.
- [24793] fix to HTML formatting in calendar items is not saved to the server
- [24805] fix to email message categories are not saved to the server
- [24806] fix to email message follow up reminder and date are not saved to the server

## MDaemon Connector 7.0.3 - March 16, 2021

### FIXES

- [24148] fix to when meeting is sent using another MD Connector account in the profile, the event is not created and invitation is not sent
- [24555] fix to paperclip icon not shown for messages that have attachment after upgrade to MC 7.0.2
- [24590] fix to messages sent from an MDaemon Connector account have body stripped if the first account in the profile is not an MDaemon Connector account
- [24591] fix to Save Sent Item To feature no longer moves messages to specified folder
- [24607] fix to when forwarding a contact group as an attachment, it is corrupt when received
- [24638] fix to response to meeting request is not sent when using Outlook 2010

## MDaemon Connector 7.0.2 - February 9, 2021

### CHANGES AND NEW FEATURES

- [21597] MDaemon Connector will now use the native IConverterSession to convert all created messages from MAPI to MIME
- [23571] Updated SQLite to version 3.31.1
- [24015] Add support for Slovenian language in MDaemon Connector

### FIXES

- [22845] fix to when non-MC default account such as an Office 365, POP or ActiveSync account exists in the same profile as MC, UTF-8 characters are encoded incorrectly
- [23382] fix to message body is stripped when sending a message with an attached P7S file
- [23680] fix to sent message not saved in selected account Sent Items folder for multiple accounts profile with same display name
- [23681] fix to draft message not saved in selected account Draft folder for multiple account profiles with same display name
- [23965] fix to when using multiple accounts profile with same display name authentication used does not match sender

## MDaemon Connector 6.5.2 - April 14, 2020

### CHANGES AND NEW FEATURES

- [23334] Your Name field is required to be filled in the "General | User Information | Your Name" setting

### FIXES

- [15284] fix to enabling the MC option "Send meeting requests in iCalendar format" breaks meeting invitations containing embedded images. Embedded attachments in the meeting request body will not be sent. Some users might not be able to receive meeting request body that contains embedded attachments. To ensure that all attendees receive the attachments, remove them from the body, and then on the Insert tab, in the Include group, click Attach File to reattach them.
- [22573] fix to when disabling a particular Outlook add-in in MDaemon, you see a dialog box every time you start Outlook
- [22805] fix to 32-bit MC client installer detects that Outlook 64-bit is installed and continue with installation
- [23281] fix to a message's timestamp is reset when a message is marked as read using ActiveSync. Fix is also available in MD 20.0.0.
- [23333] fix to Send/Receive is not working when Your Name field is empty

## MDaemon Connector 6.5.1 - December 10, 2019

### CHANGES AND NEW FEATURES

- [22545] MDaemon Connector checks for an updated signature from the server on a regular basis instead of only at startup.

### FIXES

- [12845] fix to possible hang after receiving a meeting invitation
- [21129] fix to Error 11999 occurs in PDFCreator when generating new message while Outlook is closed
- [22530] fix to inline images in a pushed signature may not be included in sent messages

## MDaemon Connector 6.5.0 - October 15, 2019

### CHANGES AND NEW FEATURES

- [19283] Added support for email signatures pushed from the server. Requires MDaemon 19.5.0 or newer. Only plain text and HTML signatures are supported, not rich text.

### FIXES

- [21871] fix to Object Not Found error when opening attachment after specifying a new attachment path
- [22022] fix to attachments in embedded rich text messages may be missing
- [22135] fix to default MC account not displaying the "Always use HTML as default message format" setting in the Miscellaneous tab
- [22136] fix to MC not recognizing the default account when set via Outlook Setting (File | Info | Account Setting)

## MDaemon Connector 6.0.2 - June 13, 2019

### FIXES

- [21664] fix to messages for 2019warded as attachments do not display correctly if "Download headers only" is enabled
- [21665] fix to calendar events marked as private in a shared calendar do not show as private in MD Connector
- [21699] fix to message flagged as completed that is downloaded into Outlook does not show "Mark Complete" selected in the context menu

## MDaemon Connector 6.0.1 - May 14, 2019

### FIXES

- [21613] fix to contact photo created in MDaemon Webmail does not display in Business Card view

## MDaemon Connector 6.0.0 - April 16, 2019

### CHANGES AND NEW FEATURES

- [5602] Added database management tool to automate database functionalities with command line capability.

  Outlook cannot be running to use the purge/compact functionalities. This program will compact and purge MDaemon Connector database file. There are four main command line options:
  (1) Use the /f command line option to specify the location of the database file, LocalCache.db. This option is required for both the compact and purge options.
  (2) Use the /c command line option to compact the database file, Localcache.db. Use the /s switch to specify the cache size. Use the /g switch to specify the page size.
  (3) Use the /p command line option to purge the message body of mail messages and purge orphaned attachment files. Use the /d switch to specify the age of the file.
  (4) Use the /? command line option for additional information about the available command line options
  EXAMPLES:
  databasemgmt.exe /f="C:\\Users\\oc1\\AppData\\Roaming\\Alt-N\\Outlook Connector 2.0\\Accounts\\oc1\\oc1@altn.test.com\\LocalCache.db" /c
  databasemgmt.exe /f="C:\\Users\\oc1\\AppData\\Roaming\\Alt-N\\Outlook Connector 2.0\\Accounts\\oc1\\oc1@altn.test.com\\LocalCache.db" /p
  databasemgmt.exe /?

- [6071] Added a button to the MDaemon Connector Client that warns a user when they are approaching the quota limit set by the administrator and alerts the user when they are over quota. If the quota is restricting the number of messages allowed, the user will be warned when they are within 50 messages of the limit set. If the quota is restricting the amount of disk space that can be used, the user will be warned when they are within 5 MB of the limit set.
- [20964] Updated SQLite to version 3.25.3
- [21169] MDaemon Connector will now use the native IConverterSession to convert all downloaded messages from MIME to MAPI
- [21375] Add 'Empty Deleted Items Folder' button to quota form

### FIXES

- [17173] fix to paperclip icon shown for messages that have inline images but no attachments
- [18916] fix to cannot disable autoresponder schedule from the plugin
- [21101] fix to 64-bit MC client installer does not detect that Outlook 32-bit is installed and proceed with installation
- [21439] fix to after 5.6.2 update, messages marked as complete in one client show as flagged in another client
- [21461] fix to when accessing a draft that was saved in a different MD Connector client, it cannot be edited or sent
- [21487] fix to when replying to a message that has RE: in the Subject, another RE: is added to it
- [21488] fix to paperclip icon not shown for messages that have attachment after upgrade to MC 5.6.2
- [21495] fix to BCC header is not displayed in a sent message
- [21497] fix to when Download Headers Only is disabled, some messages will display duplicate attachments
- [21525] fix to attachments in certain downloaded messages are missing

## MDaemon Connector 5.6.2 - March 18, 2019

### FIXES

- [21404] fix to Outlook crash when ICS event invite is received

## MDaemon Connector 5.6.1 - February 12, 2019

### FIXES

- [21248] fix to cannot edit the body of calendar, task, contact and journal items after January 2019 Microsoft updates

## MDaemon Connector 5.6.0 - September 25, 2018

### CHANGES AND NEW FEATURES

- [16628] Generate a configuration report for MC. Outlook Send/Receive schedule for 'All Accounts' is included in the configuration report.
- [19406] Centrally managed send/receive schedule. Requires MDaemon 18.5.0 or newer.
- [20287] A "Change Password" button has been added on the MDaemon Connector account settings dialog that lets users change their MDaemon password if they have permission to do so.
- [20400] MC does not try to authenticate to MDaemon using CRAM-MD5 over a SSL/TLS connection
- [20705] Delay Send/Receive process while Outlook is loading the folders' content tables during start up

### FIXES

- [20664] fix to clear signed S/MIME message appears OK in Outlook/IMAP, but displays headers in the MC profile
- [20863] fix to client installer error due to the incorrect Outlook bitness detected if previous versions of Outlook were installed

## MDaemon Connector 5.5.2 - June 12, 2018

### FIXES

- [20354] fix to on some machines Outlook may pop up a security warning when a compose window is opened if 'Always use HTML as default message format' option is enabled
- [20539] fix to upgrading from MC 5.5.0 to MC 5.5.1 causes a shortcut error
- [20541] fix to 64-bit autoupdate does not remove previous version of OC 5.0.1 or older version
- [20549] fix to forwarding a particular message causes Outlook to crash
- [20557] fix to uninstall does not remove all files
- [20558] fix to software autoupdate fails in MC 5.5.1 after receiving notification of an available update and selecting yes

## MDaemon Connector 5.5.1 - May 15, 2018

### FIXES

- [18471] fix to crash when attempting to sort by categories
- [20442] fix Automatic Update installs English MDaemon Connector Client

## MDaemon Connector 5.5.0 - April 17, 2018

### CHANGES AND NEW FEATURES

- [2815] Added S/MIME support for message signing and encryption

  IMPORTANT: There are three known issues with S/MIME support:
  (1) A crash occurs when Outlook tries to sign or encrypt a plain text or RTF message using Outlook 2016 and Windows 10.
  (2) Embedded S/MIME encrypted message within sent encrypted S/MIME message will have blank message body.
  (3) S/MIME receipt is not supported at this time.

- [11707] MDaemon Connector will prompt the user to change their password if the account's MDaemon password has expired or must be changed.
- [19544] MC 32-bit EXE client installer size is reduced
- [20024] Rename Outlook Connector to be MDaemon Connector
- [20354] An option has been added to force the use of HTML formatting when composing a new message, replying to a message, and forwarding a message. If S/MIME is being used, it is recommended that this option is enabled. On some machines Outlook may pop up a security warning when a compose window is opened if this option is enabled.

### FIXES

- [9845] Possible fix to MC account setting property pages not fitting properly in screen space
- [19686] MC client installers disable the Simplified Account Creation in Outlook 2016 via the registry to address account creation issue
- [19898] fix to text changes are not saved when composing with html message template files (.OFT)]
- [20357] fix to an Outlook crash when downloading a malformed message

## Outlook Connector for MDaemon 5.0.1 - December 19, 2017

### FIXES

- [14554] fix to when using Excel and sending spreadsheet as attachment, Excel freezes when clicking the To button on the Outlook Connector composed message
- [19948] fix to OC hangs when accessing the Outlook Address Book via other Outlook add-ins
- [19949] fix to Estos ProCall software hangs on startup after upgrading to OC 5.0.0

## Outlook Connector for MDaemon 5.0.0 - September 26, 2017

### CHANGES AND NEW FEATURES

- [5378] Junk Email folder / Blocked Senders support
- [16628] Generate a configuration report for OC
- [18634] Hide the Spam/Not-spam buttons in Outlook Connector toolbar if the user does not have "insert" rights to the MDaemon Bayesian Learning "Spam" and "Non-Spam" folders
- [19219] The central management system for Outlook Connector has been expanded to allow MDaemon administrators to configure which Outlook addins are allowed to run and which ones should be disabled. This should help to reduce support issues caused by these add-ins and prevent them from interfering with Outlook Connector. The MDaemon administrator can configure the plugins by opening MDaemon and going to Setup / Outlook Connector / OC Client Settings / Add-ins.

### FIXES

- [12131] fix to OC shortcuts not created in Programs Menu for non-English 64 bit client installer
- [17707] Possible fix to OCService is not installed in a terminal services environment
- [17815] fix to OC deadlock when starting up Outlook with new iCal message in Inbox
- [17843] fix to OC 4.0.1 deadlock
- [18011] fix to when a POP3 account exists in an OC profile, you are prompted for password every time you send an email
- [18219] fix to file size of forwarded attachment is missing in the compose window
- [18499] fix to Outlook crashes when attempting to open a Journal folder that has entries
- [18629] fix to duplicate Junk E-mail folders are created on non-English version
- [18865] Changes to address the mapi32.dll issues introduced by Microsoft's Windows 10 Creators Update.
- [19162] fix to possible crash on Outlook 2016 after the reminders popup is displayed
- [19190] fix to OC/MAPI deadlock when sending message
- [19490] fix to OCService is not installed and started after an autoupdate
- [19492] fix to OCService is not installed and started when using silent mode in command line option

## Outlook Connector for MDaemon 4.5.1 - July 27, 2017

### CHANGES AND NEW FEATURES

- [18865] Changes to address the mapi32.dll issues introduced by Microsoft's Windows 10 Creators Update.

## Outlook Connector for MDaemon 4.5.0 - March 28, 2017

### CHANGES AND NEW FEATURES

- [2886] Added option to configure forwarding within out of office settings in Outlook. Requires MDaemon 16.5.2 or newer.
- [2944] The out of office UI displays and saves the responder message text even when the responder is turned off. Requires MDaemon 16.5.2 or newer.
- [10343] Added Spam and Ham buttons for OC Toolbar
- [10628] "Send meeting requests in iCalendar format" setting is enabled by default
- [13889] Added support for 64-bit MSI installer. Changes have also been made to the former 32-bit MSI installer. As of now, there are two MSI installers, the 32-bit MSI installer and the 64-bit MSI installer. Language specific transform (.MST) files are available for the 32-bit MSI installer and the 64-bit MSI installer. There are 16 transform files for the 32-bit MSI installer and 16 transform files for the 64-bit MSI installer. The main language of the 32-bit and 64-bit MSI installers are English. You may use the transform files to customize the language of OC. You may use the MSI installer and the transform file, if applicable, to deploy OC through group policies.
- [15066] Disable/warn users who try to create an out of office message when they do not have the permissions on MDaemon to do so
- [17277] Autoupdate notification prompt will not occur if the OC service is not running
- [17574] Updated SQLite to version 3.16.2
- [17780] Added support for DB relocation when database path changed from the server
- [17781] Added proxy server support for license requests. If the installer is unable to download a license file it now prompts for a proxy server address and credentials which it will use to retry the HTTPS request.
- [17848] Added support for attachment directory relocation when changed from the server
- [17979] Added support for Automatic Update Service Feature in 64-bit OC version. It is a feature that keeps your client up-to-date with the latest OC releases. When you have auto update enabled, it will check for updates. When updates are available, the user will be prompted to upgrade. A popup dialog box will prompt the user to either install the updates or be reminded later. If the user clicks "Yes", Outlook will shut down, the latest updates will be installed and Outlook will restart after the installation. The initial installation of the OC client requires a user with administrative rights to manually install the auto update service. The auto update service handles the update deployment, allowing users without administrative rights to install updates. The auto update service must be running for the auto update feature to work. The Automatic Update Service Feature for 64-bit OC version requires MDaemon v16.5.0 or higher.

### FIXES

- [14554] fix to Excel may hang when clicking the To button in the compose window when sending a spreadsheet as an attachment
- [15546] fix to searches that should return results occasionally return no results on Outlook 2013 or newer
- [18138] fix to possible Outlook crash when doing a send/receive while searching
- [18220] fix to clicking on the "Click here to see what's new before installing Outlook Connector for MDaemon" link in the server installer does not open the default web browser
- [18249] fix to when creating an account, clicking the "Test & Get Account Settings" button may clear the Your Name and Organization fields
- [18381] fix to meeting invite from 3cx not displaying HTML part of email
- [18383] fix to OL 2016 crash when messages sorted by category
- [18435] fix to Outlook will not start up and load profile if the "Your Name" field is empty
- [18448] fix to Swedish and Dutch translations incorrect for bitness and version check on client installers
- [18508] fix to OC shortcut for license agreement not working in 32-bit client installer

## Outlook Connector for MDaemon 4.0.1 - November 15, 2016

### CHANGES AND NEW FEATURES

- [17614] Added support for TLS versions 1.1 and 1.2 for secure connections to MDaemon. Requires Windows 7 or newer.
- [17754] Environment variables such as %APPDATA% may be used in OC's database path and attachments directory values. OC defines two custom variables: %OUTLOOKPROFILE% which expands to the Outlook profile name and %OUTLOOKEMAIL% which expands to the OC account's email address.

### FIXES

- [17669] fix to iCalendar meeting cancellation message for an instance of a recurring event from OC cannot be removed in WorldClient
- [17704] fix to OC may not apply all centrally managed settings in certain cases
- [17706] fix to corrupted non-ASCII characters on popup about the admin having specified invalid incoming and/or outgoing servers
- [17776] fix to "Test & Get Account Settings" button may change the account's display name and user's full name to its email address
- [17777] fix to "Test & Get Account Settings" button may change settings to be different than what is configured to be pushed by MDaemon

## Outlook Connector for MDaemon 4.0.0 - September 13, 2016

### CHANGES AND NEW FEATURES

- [2941] The directory where OC stores attachments can now be configured in the account's config.xml <attachDir> setting. A blank value means use the default, which is the "Attachments" subdirectory of the local cache location. To better support roaming profiles it can be changed to a non-roaming local or network location.
- [8216] OC client settings can be managed via MDaemon's Centralized Management feature. Outlook Connector settings can be pushed to the Outlook Connector users. This feature requires MDaemon 16.5.0 Pro. You may access this feature in MDaemon via "Setup|Outlook Connector" and configure default client settings to push to all OC users of all domains. Please refer to MDaemon 16.5.0 release note for additional information about MDaemon's [8526] Centralized Management of OC Client Settings feature.
- [9399] Outlook Connector will attempt to automatically discover settings. Users only need to provide their email address and password to connect to the MDaemon server. When the user clicks Test & Get settings Outlook Connector will try to find the server by testing common FQDN values.
  For IMAP, it tries to authenticate to mail.domain using the dedicated SSL port, then the non-SSL port with TLS. This is repeated for imap.domain, the domain name, and then imap.mail.domain. If all attempts fail then non-encrypted logins are attempted.
  For SMTP, it tries mail.domain using port 587, 25, and then 465 first using SSL and then TLS. This is repeated for smtp.domain, the domain name, and then smtp.mail.domain. If all attempts fail then non-encrypted logins are attempted.
  If Outlook Connector is able to successfully authenticate then the incoming and outgoing server information along with the SSL/TLS information is configured.
- [10627] Update release notes to HTML files

### FIXES

- [8046] fix to certain message/rfc822 attachments may be blank when opened in Outlook
- [17318] fix to messages sent from secondary IMAP account are not saved in Sent Items folder

Copyright ©1996-2026 MDaemon Technologies, Ltd.

MDaemon v26.0.1 - April 2026. Copyright © 1996-2026. All rights reserved. MDaemon Technologies