17 Oct
2020
17 Oct
'20
12:17 p.m.
On 2020-10-17 10:59+0100, John Winters wrote:
Some e-mails from BT Internet customers take of the
order of 3 weeks
to arrive. Looking at the headers, they move around between a couple
of BT server to begin with, then sit on the final one for up to 3
weeks before they are delivered to my server.
Personally, I'd setup a tcpdump watching BT owned netblocks on tcp/25
and see what happens. Does your mail setup log tcp connects?
Do you use greylisting?
Ed