Re: IPv6 recap
Sam Varshavchik <[email protected]>
| Newsgroups | gmane.mail.imap.courier.general |
|---|---|
| Message-ID | <[email protected]> |
Alessandro Vesely writes: > Hi, > > this happened again, but this time caused a bounce: > > <<< 554 resimta-c2p-559421.sys.comcast.net resimta- > c2p-559421.sys.comcast.net 2a02:29e1:500:6c00::4 Comcast requires that all > mail servers must have a PTR record with a valid Reverse DNS entry. > Currently your mail server does not fill that requirement. For more > information, refer to: https://postmaster.comcast.net/smtp-error- > codes.php#554 > > Is it possible to inhibit use of IPv6 a little bit harder? Can you block all IPv6 connections to port 25 on your firewall? _______________________________________________ courier-users mailing list [email protected] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
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