[Mailman-Users] mails send from sendmail with commandline to mailman become 'Message has implicit destination'

Mark Sapiro mark at msapiro.net
Tue Dec 29 12:45:46 EST 2015

On 12/28/2015 10:16 PM, MichaelLeung wrote:
> normally , dovecot service will save a copy of mail that i sent , but ,
> mailx won't ,

You can always send yourself a 'Bcc' with the -b option. However, I can
assure you that your 'Heirloom mailx 12.4 7/29/08' is putting To: and
Subject: headers in the mail it creates.

> i sent those test mail to these two mail servers , one accept test mails
> just did as yours , another one (the one are fixing ), lost the To: and
> subject:header.
> i start to believe that is my sendmail service's problem.

I have never heard of any MTA removing the Subject: header from a
message. Also, while MTAs can be configured to rewrite To: headers under
some circumstances, they don't generally remove them.

Further, you have said that if you send the mail from Thunderbird, it
works. If the sendmail MTA were removing To: and Subject: headers, it
would probably remove them from the Thunderbird mail as well.

You did at one point say something about aliasing or forwarding. Perhaps
it is this process which is creating a new message with missing headers.

This thread has drifted far from Mailman. To bring it back to focus, on
the Mailman list on which you have issues with implicit destination, go
to the web admin interface for that list and go to the Privacy
options... -> Recipient filters page and set
require_explicit_destination to No. This will avoid that hold.

If you have other issues with Mailman, please try to be very specific
about what you are doing and what the desired and actual results are,
and we will do our best to help you. Keep in mind that if you have
unusual or non-standard infrastructure surrounding your mail delivery,
we need very specific information about it, otherwise we can't even
guess what might be happening.

Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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