GitLab

Yesterday I tried to bump a thread where some MIT folks are on, using the shiny new submission server. My mail bounced back from those MIT addresses it seems. Here is what I got (the addresses are redacted):

This is the mail system at host submit-01.torproject.org.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<XXX@mit.edu>: host mit-edu.mail.protection.outlook.com[104.47.58.138] said: 550
    5.7.606 Access denied, banned sending IP [116.202.120.174]. To request
    removal from this list please visit https://sender.office.com/ and follow
    the directions. For more information please go to
    http://go.microsoft.com/fwlink/?LinkID=526655 AS(1430) (in reply to RCPT TO
    command)

<YYY@mit.edu>: host mit-edu.mail.protection.outlook.com[104.47.58.138]
    said: 550 5.7.606 Access denied, banned sending IP [116.202.120.174]. To
    request removal from this list please visit https://sender.office.com/ and
    follow the directions. For more information please go to
    http://go.microsoft.com/fwlink/?LinkID=526655 AS(1430)
    [BN8NAM11FT067.eop-nam11.prod.protection.outlook.com] (in reply to RCPT TO
    command)

<ZZZ@mit.edu>: host mit-edu.mail.protection.outlook.com[104.47.58.138] said:
    550 5.7.606 Access denied, banned sending IP [116.202.120.174]. To request
    removal from this list please visit https://sender.office.com/ and follow
    the directions. For more information please go to
    http://go.microsoft.com/fwlink/?LinkID=526655 AS(1430)
    [BN8NAM11FT067.eop-nam11.prod.protection.outlook.com] (in reply to RCPT TO
    command)


Reporting-MTA: dns; submit-01.torproject.org
X-Postfix-Queue-ID: 533118019B
X-Postfix-Sender: rfc822; gk@torproject.org
Arrival-Date: Sat, 18 Dec 2021 15:41:35 +0000 (UTC)

Final-Recipient: rfc822; XXX@mit.edu
Original-Recipient: rfc822;XXX@mit.edu
Action: failed
Status: 5.7.606
Remote-MTA: dns; mit-edu.mail.protection.outlook.com
Diagnostic-Code: smtp; 550 5.7.606 Access denied, banned sending IP
    [116.202.120.174]. To request removal from this list please visit
    https://sender.office.com/ and follow the directions. For more information
    please go to  http://go.microsoft.com/fwlink/?LinkID=526655 AS(1430)

Final-Recipient: rfc822; YYY@mit.edu
Original-Recipient: rfc822;YYY@mit.edu
Action: failed
Status: 5.7.606
Remote-MTA: dns; mit-edu.mail.protection.outlook.com
Diagnostic-Code: smtp; 550 5.7.606 Access denied, banned sending IP
    [116.202.120.174]. To request removal from this list please visit
    https://sender.office.com/ and follow the directions. For more information
    please go to  http://go.microsoft.com/fwlink/?LinkID=526655 AS(1430)
    [BN8NAM11FT067.eop-nam11.prod.protection.outlook.com]

Final-Recipient: rfc822; ZZZ@mit.edu
Original-Recipient: rfc822;ZZZ@mit.edu
Action: failed
Status: 5.7.606
Remote-MTA: dns; mit-edu.mail.protection.outlook.com
Diagnostic-Code: smtp; 550 5.7.606 Access denied, banned sending IP
    [116.202.120.174]. To request removal from this list please visit
    https://sender.office.com/ and follow the directions. For more information
    please go to  http://go.microsoft.com/fwlink/?LinkID=526655 AS(1430)
    [BN8NAM11FT067.eop-nam11.prod.protection.outlook.com]

I switched back to my previous setup sending my tpo mail over riseup and resent the mail (apologizing for any duplicates) and did not encounter that problem.