i'm searching for an answer for about 24 hours now and I still can't find any really useful help...
The problem appears as the following:
I'm running a debian server with Plesk 9.5.3 and qmail. Since a few weeks I'm not able to send mails to some particular servers (like web.de, aol.com). Hence I get failure notices like "Sorry, I wasn't able to establish an SMTP connection."
But when I try to send mails to gmail.com - it works! Gmail only reports a softfail in the mail header like so:
Received: from h1600XXX.?none? (DOMAIN2.TLD [XX.XXX.XX.XX]) Received-SPF: softfail (google.com: best guess record for domain of transitioning EMAIL@DOMAIN1.TLD does not designate 85.XXX.XX.XX as permitted sender) client-ip=85.XXX.XX.XX
This sounds like a dns problem for me, but I can't get an answer for that... What makes me wondering is:
- h1600XXX is correct, but it should look like h1600XXX.stratoserver.net, not ?none?
- DOMAIN2.TLD (first line) is different from DOMAIN1 (second line). Both are hosted on this machine, but is this correct? DOMAIN1 is the one I send this mail from.
Hopefully someone could help me! If you need more specific information, let me know.
My current /etc/hosts file looks like this:
127.0.0.1 localhost 18.104.22.168 h1600XXX.domain.tld h1600XXX
And my DNS record looks like this:
v=spf1 +a +mx ~all
But I'm still getting this softfail errors and I'm still not able to send mails to some particular providers.