Hi all, It's just been made aware to me that my Postfix (version 3.1.2) is having problems with IPv6. Here's the sort of thing I see in the logs, note it gives no indication it's an IPv6 problem
Sep 7 16:12:59 turing postfix/smtpd[12487]: NOQUEUE: reject: RCPT from mail-lf0-x22c.google.com[2a00:1450:4010:c07::22c]: 451 4.3.5 <da...@lockmail.net>: Recipient address rejected: Server configuration problem; from=<kristian.fiskerstr...@sumptuouscapital.com> to=<da...@lockmail.net> proto=ESMTP helo=<mail-lf0-x22c.google.com> This is a test someone did remotely | $ swaks -6 --to da...@lockmail.net --from christoph.eg...@fau.de -q TO | === Trying smtp.trisect.uk:25... | === Connected to smtp.trisect.uk. | <- 220 smtp.trisect.uk ESMTP Postfix | -> EHLO 1und1.siccegge.de | <- 250-smtp.trisect.uk | <- 250-PIPELINING | <- 250-SIZE 51200000 | <- 250-VRFY | <- 250-ETRN | <- 250-STARTTLS | <- 250-AUTH CRAM-MD5 | <- 250-ENHANCEDSTATUSCODES | <- 250-8BITMIME | <- 250-DSN | <- 250 SMTPUTF8 | -> MAIL FROM:<christoph.eg...@fau.de> | <- 250 2.1.0 Ok | -> RCPT TO:<da...@lockmail.net> | <** 451 4.3.5 <da...@lockmail.net>: Recipient address rejected: Server configuration problem | -> QUIT | <- 221 2.0.0 Bye | === Connection closed with remote host. vs | $ swaks -4 --to da...@lockmail.net --from christoph.eg...@fau.de -q TO | === Trying smtp.trisect.uk:25... | === Connected to smtp.trisect.uk. | <- 220 smtp.trisect.uk ESMTP Postfix | -> EHLO 1und1.siccegge.de | <- 250-smtp.trisect.uk | <- 250-PIPELINING | <- 250-SIZE 51200000 | <- 250-VRFY | <- 250-ETRN | <- 250-STARTTLS | <- 250-AUTH CRAM-MD5 | <- 250-ENHANCEDSTATUSCODES | <- 250-8BITMIME | <- 250-DSN | <- 250 SMTPUTF8 | -> MAIL FROM:<christoph.eg...@fau.de> | <- 250 2.1.0 Ok | -> RCPT TO:<da...@lockmail.net> | <** 450 4.2.0 <da...@lockmail.net>: Recipient address rejected: Greylisted for 60 seconds | -> QUIT | <- 221 2.0.0 Bye | === Connection closed with remote host. I've got around the problem by setting 'inet_protocols = ipv4' in main.cf, but is there anywhere else (in any configuration file) that IPv6 has to be addressed? Thanks for looking
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