jko...@luc.edu wrote on 2025-07-22 11:11:
we would really like to use both lists.luc.edu and listservnew.luc.edu. Is that
possible?
It is possible, and since it's impossible to get 100% of users to update
all future mail to the new list, it's desirable.
Is the old server still handling mail for your domain in any capacity?
Depending on how mail is routed would determine where the following
stuff would go.
On the server's postfix settings, in a canonical mapping file (aka
$your_file_name), something like this (from my new server):
## talk mailing list
t...@gtalug.org t...@lists.gtalug.org
## talk-ad...@gtalug.org talk-ad...@lists.gtalug.org
talk-boun...@gtalug.org talk-boun...@lists.gtalug.org
talk-conf...@gtalug.org talk-conf...@lists.gtalug.org
talk-j...@gtalug.org talk-j...@lists.gtalug.org
talk-le...@gtalug.org talk-le...@lists.gtalug.org
talk-ow...@gtalug.org talk-ow...@lists.gtalug.org
talk-requ...@gtalug.org talk-requ...@lists.gtalug.org
talk-subscr...@gtalug.org talk-subscr...@lists.gtalug.org
talk-unsubscr...@gtalug.org talk-unsubscr...@lists.gtalug.org
Be sure to add entries for each list migrated from old to new list.
And be sure to run `postmap $your_file_name` after creating this file.
In /etc/postfix/main.cf, need to include a reference to $your_file_name
something like this:
## BC_RON: redirect mail to, say, t...@gtalug.org to
## t...@lists.gtalug.org:
##
## Invoke the mm2 line when decommissioning Mailman v2 on old server:
recipient_canonical_maps = hash:/etc/postfix/recipient_canonical.map,
hash:/etc/mailman3/mm2_to_mm3_gtalug.org_to_lists.gtalug.org.map
I found I also had to configure "Acceptable aliases" in "Message
Acceptance" in each list's Settings for it to not reject mail to old
address with "Implicit destination" errors.
All that should get you pointed in the right direction...
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