On 8/10/19 12:04 AM, Jaroslaw Rafa wrote:
Dnia 7.10.2019 o godz. 23:54:41 Peter pisze:
Also sign up for ESP-specific programs such as
feedback loops, Google postmaster tools and Microsoft's SNDS. Check
the individual postmaster pages for each ESP that you're having
problems with to make sure that you're in compliance with all of
their policies and if you still have problems contact the support
for the ESP.
Google Postmaster Tools won't give you any information unless you send at
least a few hundred messages a day to Gmail users. So it's of no use for
small servers like mine that serve only a few accounts and send only a
handful of messages a day (and there are days when no message is sent).
The OP said, "We operate several postfix mailservers with hundreds of
users", so they would qualify for this.
** If you just need a DMARC policy to help satisfy ESP
recommendations you can use this to basically tell servers not to
enforce DMARC on your mail: _dmarc.example.com. TXT
"v=DMARC1;p=none;adkim=r;aspf=r;pct=0"
According to specs, you can't set pct to 0, it must be at least 1.
RFC 7489 section 6.3: pct: (plain-text integer between 0 and 100...
Peter
