On Thu, 19 Feb 2026, [email protected] wrote:
I'm already using postfix for things like routing outbound email to
different proxies based on the sender domain, and maybe this task
could be done from filters called by postix.
Ideas, and has anyone else started seeing this problem (enterprise SMTP servers
refusing to accept mail that references multiple
recipients in message body)?
This is not my primary use case - need to check if this breaks - the only thing
I needed to improve gmail was this ruleset
in my sendmail configuration, that creates a separate slow queue for them:
LOCAL_RULESETS
Squeuegroup
R$* $: $>canonify $1
R$* < @ gmail . com . > $#gmail
R$* < @ googlemail . com . > $#gmail
LOCAL_CONFIG
Qgmail, P=/var/spool/mqueue/googlequeue/gmail.com, I=30m, J=4, r=5, R=1
Marcin
