Andreas Prieß wrote: > Hi, > > in few words: should MUAs be allowed to set an empty sender (or what > else is happening here)? > > I sometimes see an empty sender comming in from authenticated users > MUA like this in my log: > > 2007-11-22 10:45:02 1Iv8cH-0000Xc-Ps <= <> H=p57b2e2c9.dip.t-dialin.net > (Bro) [87.178.226.201] P=esmtpsa X=TLSv1:RC4-MD5:128 > A=auth_login:[EMAIL PROTECTED] S=2663 > > 2007-11-22 10:45:02 1Iv8cH-0000Xc-Ps => [EMAIL PROTECTED] > R=dns_lookup T=remote_smtp H=mailin.rzone.de [81.169.145.100] > > 2007-11-22 10:45:02 1Iv8cH-0000Xc-Ps Completed > > > Because the users are authenticated, the messages are handled in > submission mode, with the $authenticated_id being the qualified address > of the user: > > accept authenticated = * > control = submission/domain= > > The docs say, submission mode fixes From: and adds Sender: Headers. > > But what will the envelope sender look like to the external MTA? Will > this be sent as if it was a bounce message? And does this have to be > permitted for some reason or should this be blocked? > > What I know is, the users where I see this use Outlook or Outlook > express and most of their messages show the correct sender address in > the logs. > > Thanks for any hint.
They are most likely to be delivery and read notify messages generated by the client and/or email server. They should maintain their null sender to remove the chance of mail loops. Generally a pretty benign item. -- The Exim Manual http://www.exim.org/docs.html http://www.exim.org/exim-html-current/doc/html/spec_html/index.html -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
