On Sat 24/Jun/2023 16:41:25 +0200 Bill Cole via mailop wrote:
On 2023-06-24 at 05:49:30 UTC-0400 (Sat, 24 Jun 2023 11:49:30 +0200)
Alessandro Vesely via mailop <[email protected]>
is rumored to have said:
I had a bounce:
Reporting-MTA: dns;PR3PR05MB7547.eurprd05.prod.outlook.com
Received-From-MTA: dns;wmail.tana.it
Arrival-Date: Sat, 24 Jun 2023 03:03:07 +0000
Original-Recipient: rfc822;[email protected]
Final-Recipient: rfc822;[email protected]
Action: failed
Status: 5.7.520
Diagnostic-Code: smtp;550 5.7.520 Access denied, Your organization does not
allow external forwarding. Please contact your administrator for further
assistance. AS(7555)
I'm using 94.198.96.72/29 since April, and I'm trying to remove IP blocks as
I find them.
That's not clearly an IP-based block. It looks like that is a consequence of
tana.it having -all in its SPF record. That is explicitly a prohibition on
forwarding, whether the SPF specs say so or not. It is certainly comprehensible
that a mail system which does a lot of forwarding does not want to handle your
unforwardable mail.
Their mentioning AS7555 made me think about a routing problem.
SPF -all bounces usually say "Address does not pass the Sender Policy Framework"
Best
Ale
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