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# MDaemon Email Server 26.0

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Header Changes

Replace 'To:' header 'Display Name' with:

Use this option to designate the text to display in the name portion of the TO: header whenever MDaemon receives a message directed to the list.

Nothing (make no changes) - When this options is selected MDaemon will make no changes. The display name and address contained in the TO: header will appear exactly as the sender of the message entered them.

List's name - This option replaces the displayed name with the name of the list plus "List Member". For example, for a mailing list named "My-Family" the display name portion of the To: header would say, "My-Family List Member".

Member's name (if known) - When this option is selected, the TO: header will contain the name (if available) and address of the list member to whom the message is directed.

| The Member's name option can only be chosen when "Deliver list mail to each member individually" has been selected on the Routing screen. When "Deliver list mail using individual RCPT commands for each member" is selected, MDaemon will default to the List's name option.

Replace 'Reply-To:' header email address with

This option is for designating the email address that will appear in each list message's Reply-To: header.

Nothing (make no changes)

Choose this option if you wish to leave the Reply-To: header unchanged from whatever it is in the original message that will be distributed to the list. This is generally the option you should choose when you want replies to be directed back to whomever posted the message to the list, rather than to all of the list's members.

List's email address

Choose this option if you want replies to be directed to the list rather than to a specific person or address. This is the option you should choose if you wish to use the list as a group discussion tool, where replies are sent to all members.

This email address

If there is a specific email address to which you wish replies to be sent then type it here, or click the Account icon if you wish to browse for a specific MDaemon account to use. You could use this option, for example, for something like an email newsletter with a specific contact address for replies.

Replace 'From:' with List's name and email address

Check this box if you wish to replace the contents of the "From:" header with the mailing list's name and email address.

Replace 'From:' email address with list's email address if message is sent from a domain that publishes restrictive DMARC policy

By default, when an incoming message to the list is sent from a user at a domain that publishes a restrictive DMARC policy (i.e. p=quarantine or p=reject), MDaemon will replace the user's email address in the From: header with the address of the list, before sending the message to the list. This is necessary to prevent the list message from being rejected by servers that honor restrictive DMARC policies. In addition to changing the From: header's email address, the displayed name will also be modified to add "via List Name," to show that it is a message sent by that mailing list on behalf of the named person. Further, any time the From: header is changed by this feature the original From: header data will be moved into the Reply-To: header, but only if the message has no Reply-To: header to begin with and the list isn't configured to display a custom Reply-To: header.

| This action will only be taken when the DMARC Verification option is enabled and verification has been performed on the incoming message.

| You should not disable this option unless you fully understand the ramifications of doing so and are certain that you need to disable it. Disabling this option would likely cause some list messages to be rejected by some receiving servers, and in some cases it could cause the recipient to be automatically removed from list membership. Alternatively, you could enable the Refuse messages from domains with restrictive DMARC policies option instead, which causes incoming messages to the list to be refused when coming from a domain with a restrictive DMARC policy.

Prepend 'Subject:' header text with name of list

This setting causes MDaemon to enclose the name of the list in brackets (e.g. [ListName]) and add it to the beginning of the Subject: in all messages sent to the list. This is enabled by default.

Append 'Subject:' header text with thread number

This switch allows you to toggle whether thread numbers will be displayed in the Subject: header of list messages. They are appended to the end of the subject line in braces and used as a pseudo thread number. Sorting your Inbox by subject will align list mail in chronological order. This option is disabled by default.

MDaemon v26.0.0 - March 2026. Copyright © 1996-2026. All rights reserved. MDaemon Technologies