________________________________________ >From: Reindl Harald <h.rei...@thelounge.net> >Sent: Thursday, September 24, 2015 5:12 AM >To: Philip Prindeville >Cc: users@spamassassin.apache.org >Subject: Re: Test for empty EnvelopeFrom
>Am 23.09.2015 um 19:24 schrieb Philip Prindeville: >> Stating facts here, not giving an opinion. Not sure what’s up for debate. >>> >>> if it is empty it's <> aka Null-Sender and you really don't block that >>> because >>> you violating RFC's, block sane autoreplies usng it to prevent mail-loops >>> and >>> the subject indiactes one thing; you donät really understand how email works > >> Rejecting messages based on their content PERIOD is violating the RFC’s. >> What’s your point? >do what you want - a empty envelope from is not a sign of spam I agree with Reindl. You can't block null senders or you break a lot of legit emails. There are tools out there to prevent backscatter so you can detect fake messages with a null sender. MailScanner has this built in and works well if you send your outbound messages through it. It adds a special header that will be included in a legit bounce message but won't exist in a fake one so you can detect them. P.S. MailScanner can be a little tough to get going with the web interface. This is a VM with everything ready to roll with a number of excellent tweaks already done for you including the Watermarking feature to help block backscatter. http://efa-project.org/
