They tried to say it was my server, not theirs. I had to prove it was them with a test mail using gmail and showing that the ip's in the missent mail were all theirs.
It's tricky because their system adds the original and destination e-mail address as
(not the real addresses) so it looks like the mail is coming from there instead of going there.
Their system also appears to add a postmaster spoof of the destination domain:
Thu, 13 Mar 2014 15:30:09 -0700 (PDT)
Received-SPF: softfail (google.com: domain of transitioning Postmaster@gmail.com
does not designate 18.104.22.168 as permitted sender) client-ip=22.214.171.124;
spf=softfail (google.com: domain of transitioning Postmaster@gmail.com
does not designate 126.96.36.199 as permitted sender) smtp.mail=Postmaster@gmail.com;
dmarc=fail (p=NONE dis=NONE) header.from=gmail.com
Received: from mail pickup service by mail2world.com with Microsoft SMTPSVC;
There was a spoof alert message on this e-mail from gmail.
IP: 188.8.131.52 is theirs: Domain: mwde06oc.mail2world.com
Anyway, they finally acknowledged the problem was on their end, then it was fixed. They said they just had to reset my account--so why didn't they do that 3 days ago?