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A comment on Don't send to Gmail over IPv6. Parent comment

Re:Don't send to Gmail over IPv6 by jeroenhd on Friday June 03, 2022 @11:52AM (#31610014)
The 550 messages are quite clear, but Gmail has the nasty tendency to accept email and then flag it as spam, stuffing it away in the spam folder to be automatically deleted in 30 days.

Requiring SPF/DMARC/DKIM/PTR shouldn't really be a problem, but there are extra layers of spam filtering on top of the problems Gmail will give you feedback about.

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Re:Don't send to Gmail over IPv6 by Avamander on Friday June 03, 2022 @05:08PM (#31613626)
> Requiring SPF/DMARC/DKIM/PTR shouldn't really be a problem

Oh I wish that were the case. One recent "lovely" example I stubled upon is Deutche Telekom (t-online.de) not willing to use SPF because it's not perfect enough for them.

It's only the tip of the iceberg unfortunately.

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