Viktor Dukhovni via Postfix-users <postfix-users@postfix.org> wrote: > On Mon, Jan 08, 2024 at 04:02:48PM +0100, Michael Grimm via Postfix-users > wrote:
>> Sometimes outgoing mail is deferred due to "reputational issues" at >> the receiving side. These "reputational issues" mostly concerned my >> IP6 addresses, thus I removed IP6 mailing completely. But now, I do >> want to give it a try, again. >> >> In the past, whenever a mail has been deferred, I manually modified >> inet_protocols to the protocol *not* involved, restarted postfix and >> ran 'postqueue -f'. After having the "reputational issue" solved, I >> returned to inet_protocols=all. > > You shouldn't need anything nearly so complex. > > I have in master.cf: > > smtp unix - - n - - smtp > smtpv4 unix - - n - - smtp > -o inet_protocols=ipv4 > smtpv6 unix - - n - - smtp > -o inet_protocols=ipv6 > > For destination domains found to have issues with IPv6 (or conversely > with IPv4) just specify one of the alternative transports. > > gmail.com smtpv4:gmail.com > example.com smtpv6:example.com Thanks, this is a good solution in my case, especially due to the fact, that those "reputational issues" are not that very often to solve. But will that work, once a mail has been deferred and is sitting in the queue already? Meaning, if a 'postqueue -f' will retry with smtpv4, instead sticking to the old IPv4 address? > Of course, as noted by Wietse, when MX-hosts for a myriad (not possible > to explicitly list) domains need a specific transport, the DNS reply > filter comes in handy. Between that, and explicit transports you should > be able to have IPv4+IPv6 as a default with appropriate work-arounds. > > Or perhaps IPv4 as a default, with IPv6 or both for domains where those > work better. I do still have sooo much to learn, even after 10+ years of using postfix ;-) Thanks to both of you and regards, Michael _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
