Re: Gmail hates (my) IPv6

[Jeffrey Haas <jhaas@xxxxxxxx>]

[Trimming the other "why" points to attempt to let that part of the thread die.]

On Aug 12, 2025, at 4:39 AM, Philip Homburg <pch-ietf-8@xxxxxxxxxxxxxx> wrote:

Short term, why not make a mail routing exception for Gmail? Just 
accept that you can only reach Gmail over IPv4. Or use a mail provider and
route only mail with a gmail destination to the mail provider.

The following recipe was offered for postfix in one of the private replies to this thread.  Minimally it suggests that while I'm having potentially "other" issues with gmail, this is a known headache.  Again, embarrassing that it's the case this far into IPv6 deployment:

:; grep smtp_dns_reply_filter main.cf
smtp_dns_reply_filter = pcre:/etc/postfix/smtp_dns_reply_filter

:; cat smtp_dns_reply_filter 
# /domain ttl IN AAAA address/ action, all case-insensitive.
# Note: the domain name ends in ".".
/^\S+\.google.com\.\s+\S+\s+\S+\s+AAAA\s+/ IGNORE

-- Jeff