[MlMt] Setting email alias as default email address

[Bill Cole]

On 2025-11-20 at 15:11:47 UTC-0500 (Thu, 20 Nov 2025 15:11:47 -0500)
Jon Sutton via mailmate <mailmate at lists.freron.com>
is rumored to have said:

> Many email service providers support multiple aliases on a single 
> account.  Mailmate supports this in the account settings “*Email 
> address(es):*” field.  However in the *Composer* pane of the general 
> settings, you can select a default email account but not a specific 
> alias.

MM uses the first address listed in the account settings address list as 
the default for that account.

When replying to a message, MM examines the original message to see what 
address it was sent to and uses that as the From on replies.

> Is there a way to specify one of the aliases associated with this 
> account as the default From address for new messages?

List it first in the Addresses field of the Account Settings. You can 
actually put any address there and MM will use it, but I wouldn't rely 
on messages actually being accepted if you use an address that does not 
belong to you.

For example, I have an address @apache.org because I'm a Committer, but 
that's strictly a forwarder that actually delivers to an ugly alias for 
my main account  into a particular folder via a server-side filter, just 
like YOUR message  If I respond to that message, it uses the "To" in the 
message (OR X-Original-To, if it exists...) and tries to match it to an 
account. If it sees my ASF address, it uses that as the From on a reply 
and uses a *distinct account* for sending the message, using an ASF mail 
server.

In short: MM has no real concept of "real" vs. "alias" addresses. Its 
choice of a From address (and a sending account) is based on what you 
tell it is your address and what it sees in your mail.

-- 
  Bill Cole
  bill at scconsult.com or billcole at apache.org
  (AKA @grumpybozo at toad.social and many *@billmail.scconsult.com 
addresses)
  Not Currently Available For Hire