i made some tests .. i sent an email with a zip attachment to one address only..everything good till here.. but when i sent the same email message (with the same zip file as attach..and the file's size it's only 145kb!) to 2 distribution lists we have ... the message got stucked in the deferred queue..
this is really not good for what we need..we rely on these emails and not getting them is a huge problem.. is this a bug ?
please advise.