Hi,

I'm getting "421 EHLO temporary error - PTR lookup failed" when trying to send any email to @bluewin.ch recipients.

My mailserver is mail.swill.org with proper PTR records configured though:

$ dig +short -t ptr 203.200-30.135.144.213.in-addr.arpa @8.8.8.8
mail.swill.org.

$ telnet 195.186.120.50 25
Trying 195.186.120.50...
Connected to 195.186.120.50.
Escape character is '^]'.
220 mxbw.bluewin.ch vimdzmsp-mxin03.bluewin.ch Swisscom AG ESMTP server ready
ehlo mail.swill.org
421 EHLO temporary error - PTR lookup failed

Is there someone from bluewin.ch here that can help me work through this?

best,

Maxim

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