Test forcing your MTA to send to Gmail over IPv4 instead of IPv6. Gmail's filtering is much more harsh on IPv6. This has actually bit me before in the past.
Cheers, Al Iverson On Thu, Nov 19, 2020 at 8:11 AM Stuart Henderson via mailop <mailop@mailop.org> wrote: > > On 2020/11/19 13:47, Paul Waring via mailop wrote: > > On Thu, Nov 19, 2020 at 01:29:48PM +0000, Chris Woods wrote: > > > I dropped the TTL on the MX, SPF, DKIM and DMARC records to 300 about > > > 36 > > > hours before starting the migration, and published the new DKIM key as > > > well. I left the records at 300 for about 72 hours after the migration > > > and then moved them up to 3600. > > > > > > > > > Correct the PTR, it's currently "romana.vs.mythic-beasts.com". > > > > I'm not sure what's wrong about the PTR? > > > > 1. The hostname of the machine is romana.vs.mythic-beasts.com > > > > 2. The hostname used in HELO is romana.vs.mythic-beasts.com > > > > 3. The MX record for xk7.net is romana.vs.mythic-beasts.com > > > > 4. romana.vs.mythic-beasts.com has an A record and AAAA record > > > > 5. The IP addresses in the A & AAAA records have PTR records to > > romana.vs.mythic-beasts.com > > > > Isn't that the correct way to have things? > > That all looks right. > > No idea how things work in gmail with keys, but it may be better to > use the original DKIM key? That would provide some kind of continuity > original from th server/IP to the new one, whereas now you have new IP > *and* new key at the same time. > > If you're sending into them over v6 I would disable that too, > most of the common open source MTAs have a feature to prevent sending > over v6 exactly because of gmail. > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop -- Al Iverson // Wombatmail // Chicago Song a day! https://www.wombatmail.com Deliverability! https://spamresource.com And DNS Tools too! https://xnnd.com _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
