I am subscribed to a mailing list whose owner sent the following message to me. I'm not sure what's going on here but it appears that outlook is blocking email from mxc04.zoneedit.com.
I have received other email to that domain today so it may be just a temporary glitch.
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It looks like your mail server is set up to forward mail to that
address to ...@alum.mit.edu. However, Microsoft is blocking the
server that's doing the forwarding and causing mail to bounce. See
this message:
This is the mail system at host mxc04.zoneedit.com.
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
<...@alum.mit.edu>: host
alum-mit-edu.mail.protection.outlook.com[52.101.10.5] said: 550
5.7.1 Service unavailable, Client host [64.68.198.24] blocked using
Spamhaus. To request removal from this list see
https://www.spamhaus.org/query/ip/64.68.198.24 AS(1440)
[BN2PEPF000044AC.namprd04.prod.outlook.com 2025-12-01T19:49:17.419Z
08DE2EC00A2AE8BA] (in reply to RCPT TO command)
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I have received other email to that domain today so it may be just a temporary glitch.
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It looks like your mail server is set up to forward mail to that
address to ...@alum.mit.edu. However, Microsoft is blocking the
server that's doing the forwarding and causing mail to bounce. See
this message:
This is the mail system at host mxc04.zoneedit.com.
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
<...@alum.mit.edu>: host
alum-mit-edu.mail.protection.outlook.com[52.101.10.5] said: 550
5.7.1 Service unavailable, Client host [64.68.198.24] blocked using
Spamhaus. To request removal from this list see
https://www.spamhaus.org/query/ip/64.68.198.24 AS(1440)
[BN2PEPF000044AC.namprd04.prod.outlook.com 2025-12-01T19:49:17.419Z
08DE2EC00A2AE8BA] (in reply to RCPT TO command)
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