Sending mails to a mailing list with sender restrictions from an external email address
hello,
is there a way to allow sending mails from a specific external email address to a mailing list with sender restrictions?
i know how it works with internal users/members of the mailing list but if i try it with an external email address (even if this email is a member of this mailing list) i get this error:
550 5.0.350 Remote server returned an error -> 550 Address unknown
Can someone tell me how to set this up or is this even possible?
p.s: i only have domain-admin permissions for icewarp therefore i have to consult my hoster for changes i can’t do on my own.
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