For unknown reasons, I got one of these tossed at me by a customer who
inexplicably wants to send mail to an @att.net address
Action: failed
Status: 5.3.0
Remote-MTA: dns; al-ip4-mx-vip1.prodigy.net
Diagnostic-Code: smtp; 553 5.3.0 alph774 DNSBL:RBL 521< 74.115.114.190
_is_blocked.For assistance forward this error to
abuse_...@abuse-att.net
Having seen those a half-dozen times in as many years, I pulled up my
last removal request, replaced the different bits, and sent it off to
the address specified by AT&T in their error message:
abuse_...@abuse-att.net
A few seconds later, I get this gem:
The original message was received at Sat, 6 May 2023 16:04:31 -0400
from m0288871.ppops.net [127.0.0.1]
----- The following addresses had permanent fatal errors -----
<abuse_...@abuse-att.net>
(reason: 550 5.1.1 <abuse_...@abuse-att.net>: Recipient address
rejected: User unknown in local recipient table)
----- Transcript of session follows -----
... while talking to [144.160.237.58]:
>>> DATA
<<< 550 5.1.1 <abuse_...@abuse-att.net>: Recipient address rejected:
User unknown in local recipient table
550 5.1.1 <abuse_...@abuse-att.net>... User unknown
<<< 421 4.7.0 zlp11043.enaf.vci.att.com Error: too many errors
--346K4VsL001258.1683403471/m0288871.ppops.net-00191d01.
Content-Type: message/delivery-status
Reporting-MTA: dns; m0288871.ppops.net-00191d01.
Received-From-MTA: DNS; m0288871.ppops.net
Arrival-Date: Sat, 6 May 2023 16:04:31 -0400
Final-Recipient: RFC822; abuse_...@abuse-att.net
X-Actual-Recipient: rfc822; abuse_...@abuse-att.net
Action: failed
Status: 5.1.1
Remote-MTA: DNS; [144.160.237.58]
Diagnostic-Code: SMTP; 550 5.1.1 <abuse_...@abuse-att.net>: Recipient
address rejected: User unknown in local recipient table
Last-Attempt-Date: Sat, 6 May 2023 16:04:31 -0400
That's their Proofpoint inbound filter being told by an actual AT&T
machine that the address they tell people to mail does not exist.
--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Not Currently Available For Hire
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