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splitbrain / dokuwiki-plugin-smtp

Send DokuWiki mails via a configured SMTP server
https://www.dokuwiki.org/plugin:smtp
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SMTP fails for ipv6 address #41

Closed mvscheven closed 3 years ago

mvscheven commented 3 years ago

Presumably after the last update of our dokuwiki some days ago the smtp plugin not longer works as before.Sending mails fails with the following message:

There was an unexpected problem communicating with SMTP: Unexpected return code - Expected: 250, Got: 501 | 501 5.5.2 <[2001:7c0:2041:8::19]>: Helo command rejected: invalid ip address

Here is the full log:

Set: the server Set: a message will be sent Connecting to mailrelay.uni-stuttgart.de at 25 Got: 220 mx1.rus.uni-stuttgart.de ESMTP Postfix Sent: EHLO [2001:7c0:2041:8::19] Got: 250-mx1.rus.uni-stuttgart.de Got: 250-PIPELINING Got: 250-SIZE 31457280 Got: 250-ETRN Got: 250-STARTTLS Got: 250-ENHANCEDSTATUSCODES Got: 250-8BITMIME Got: 250 DSN Sent: STARTTLS Got: 220 2.0.0 Ready to start TLS Sent: EHLO [2001:7c0:2041:8::19] Got: 250-mx1.rus.uni-stuttgart.de Got: 250-PIPELINING Got: 250-SIZE 31457280 Got: 250-ETRN Got: 250-AUTH PLAIN LOGIN Got: 250-ENHANCEDSTATUSCODES Got: 250-8BITMIME Got: 250 DSN Sent: MAIL FROM:mvs@ibb.uni-stuttgart.de Got: 250 2.1.0 Ok Sent: RCPT TO:mvs@ibb.uni-stuttgart.de Got: 501 5.5.2 <[2001:7c0:2041:8::19]>: Helo command rejected: invalid ip address

According to our mail admin postfix expects a prefix for ipv6 addresses, like: Sent: EHLO [ipv6:2001:7c0:2041:8::19]

Have you experienced a similar problem before? Do you have any suggestions how to further debug or solve the problem? Thank you for any advice! Malte

splitbrain commented 3 years ago

You can explicitly set the host name used during EHLO using the localdomain setting. Ideally it should be a valid FQDN not an IP address.

mvscheven commented 3 years ago

Thank you for this immediate answer.

Setting localdomain solved my problem, even though it worked many years without and nothing was changed since.