Why hasn't anyone mentioned the mythic-beasts.com stuff being potentially problematic? The host name, A record, mx record, ptr record are all mythic-beast.com. If Google doesn't like them, all this stuff you're doing is a moot point.
On Sat, Nov 21, 2020, 6:49 AM Jim Popovitch via mailop <mailop@mailop.org> wrote: > On Sat, 2020-11-21 at 13:59 +0100, Thomas Walter via mailop wrote: > > Hello, > > > > On 21.11.20 12:54, Jaroslaw Rafa via mailop wrote: > > > You can configure your MTA to disable IPv6 only for delivery to Google > - at > > > least with Postfix it should be possible. > > > > how would one do that? > > With a custom transport table and a custom master.cf entry. > > > > We don't know all domains that sue Google MXs, we don't know all MXs > > Google uses and they might change. Do we know Google's IPv6 addresses? > > Do those change? > > It's done by destination domain, not IP address. > > Here's the relevant transport table entries of domains that I enforce > IPv4 delivery to: > > gmail.com smtp-v4: > google.com smtp-v4: > googleemail.com smtp-v4: > hotmail.com smtp-v4: > live.com smtp-v4: > outlook.com smtp-v4: > microsoft.com smtp-v4: > msn.com smtp-v4: > yahoo.com smtp-v4: > yahoo.com.mx smtp-v4: > yahoo.co.uk smtp-v4: > yahoo.es smtp-v4: > yahoo.com.br smtp-v4: > yahoo.co.in smtp-v4: > sbcglobal.net smtp-v4: > sky.com smtp-v4: > rocketmail.com smtp-v4: > aol.com smtp-v4: > > > Here's the relevant master.cf entry: > > # ipv4-only outbound > smtp-v4 unix - - y - 200 smtp > -o inet_protocols=ipv4 > ... > > > -Jim P. > > > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop >
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