On Mon, Sep 05, 2011 at 04:48:31PM +0100, Matt Harrison wrote: > I've got an odd problem and I really can't work out what is causing it. I > have two > gentoo mailservers under my control, one is working fine (it seems) but the > other is > just not getting mail out. I'm not even sure if this will be delivered until > I see it > come back through the list. > > According to my logs, the mails are being accepted without issue by the > receiving MX, > but that is the last that will be seen of them. It's not happening for every > mail, but > a lot. Recipients can be on BT Internet, gmail, or other (apparently) > unrelated > providers. > > All outgoing mail from this server is DKIM signed, in plaintext only. I've > checked and > the IP of the server doesn't seem to be on any blacklists. There is correct > reverse > dns for the server as well. I've owned the IP for around 7-8 years now and > there's > never been a problem like this. > > I've been scratching my head over this for a while now but haven't made any > progress, > in fact it seems to be getting worse. A few days ago I found a free service > (unfortunately forgotten the name now) which will recieve an email from you > and reply > with a complete breakdown of apparent authenticity, signing, spam score etc > etc. It > was absolutely perfect for my test. > > Both servers are running the current stable postfix and > amavisd/clamav/spamassassin. > > It looks to my uneducated brain that servers are accepting my mail and then > silently > dropping it without telling me why. Some of the intended recipients have > checked their > various spam folders and such but nothing shows up there either. > > If anyone can shed some light on this I would be incredibly grateful, I'm > having to > send quotes out through the post at the moment just to be sure they arrive :(
Well that one got through which is nice, and I just noticed that my servers time was just over an hour off, even though ntp-client was running. Only noticed this thanks to the threading in this list. My every day stuff doesn't get threaded (or posted back to me) so I hadn't seen it before. I've corrected the time and sent a couple of tests to previously not working addresses and I'll see what happens. Just a thought though, if for example, BT Internet was reject mail based on my clock being so wrong, they'd do it for every customer...and they haven't. I don't know, I'm out of ideas and pretty desperate now. Thanks Matt
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