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Community ▶ Questions ▶ Email rejected by 1and1.com recipients - reverse DNS issue?
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Email rejected by 1and1.com recipients - reverse DNS issue?

email

Hi all,

Mail from my server to any recipient with a 1and1.com address (a commercial email provider) is being rejected. I tried a telnet connection to the 1and1.com SMTP server as follows:

alastair@li357-174:~$ telnet mx00.1and1.co.uk 25

Trying 212.227.15.41…

Connected to mx00.1and1.co.uk.

Escape character is '^]'.

554-kundenserver.de (mxeue005) Nemesis ESMTP Service not available

554-No SMTP service

554-Bad DNS PTR resource record.

554 For explanation visit http://postmaster.1and1.com/en/error-messages?ip=178.79.188.174&c=rdns

Connection closed by foreign host.

It looks like its complaining about my reverse DNS set-up. Does anyone have any idea if that's right, and if so, what might be wrong? Or any other suggestions?

Many thanks,

Alastair

2 Replies

It appears that they don't like reverse DNS entries of the form li###-###.members.linode.com. Try setting your reverse DNS to your server's fully-qualified domain name (something like blah.example.org) and see if that helps. It may take up to 24 hours for the change to be seen at 1and1's name servers.

Perfect - that fixed it - your help was very much appreciated.

Best regards, Alastair

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