Hi, Derek Martin <[email protected]> writes:
> On Tue, Mar 29, 2016 at 02:09:15PM -0400, Derek Atkins wrote: >> So now I want to focus on Sendmail. Any sendmail guru's out there? > > Hello Derek! > > Did you ever find a solution for this for Sendmail? I would never > call myself a Sendmail guru, especially now--but I recall I spent some > time on trying to solve this a while back and failed. It seems the > Sendmail folks believe that fixing this is a bad idea, because it can > block legitimate mail e.g. if someone at your site sends mail to > someone at another site that has a .forward file that points to an > address at your site. In case that's not clear: > > From: [email protected] > To: [email protected] > > And [email protected] has a .forward file that forwards to > [email protected]. > > Apparently, this message will get lost. This seems like it should be > a fixable problem, but pffft. > > I did just find this recipe, which appears to be outdated: > > http://www.sendmail.org/~ca/email/examples/Ted.html > > I also thought SPF and/or DMARC would fix this, but I never got around > to trying to set any of that up... Alas, no, I never did figure this out. :( In my case, I know that the "forward back to myself" is never going to happen. This is just a mailman server, so all mail is either originating locally or being relayed through mailman. There should never be a remote connection where MAIL FROM is my domain. Of course it doesn't differentiate between a connection from 127.0.0.1 and a connection from elsewhere. :( So it's blocking mailman too when I put those blocks in. I think I might just switch to postfix when I have time. -derek -- Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory Member, MIT Student Information Processing Board (SIPB) URL: http://web.mit.edu/warlord/ PP-ASEL-IA N1NWH [email protected] PGP key available _______________________________________________ Discuss mailing list [email protected] http://lists.blu.org/mailman/listinfo/discuss
