I'm trying to send email to someone at University of Cagliari in Italy. His email is email@example.com. Comcast is refusing to send the message, returning the perminant error message below.
I know that the address is good. My friend (not using Comcast) has no problem sending email to this person. I believe that Comcast has some sort of blacklist/whitelist that I can access to permit my email to go through; what is it?
To eliminate the false premise that the problem had something to do with my email client, the message rejected below was sent using Xfinity webmail.
................. perminant error message from Comcast follows
Date: Wed, 06 May 2020 18:51:21 +0000 From: firstname.lastname@example.org Subject: Permanent Error
Content-Type: text/plain; charset=UTF-8;
This is an automatically generated Delivery Status Notification.
Delivery to the following recipients failed permanently:
Reason: Permanent Error
Content-Type: message/delivery-status; charset=UTF-8;
Reporting-MTA: dns; resqmta-po-05v.sys.comcast.net [188.8.131.52]
Received-From-MTA: dns; resomta-po-20v.sys.comcast.net [184.108.40.206]
Arrival-Date: Wed, 06 May 2020 18:51:19 +0000
Final-recipient: rfc822; email@example.com
Diagnostic-Code: smtp; 550 5.7.1 <resqmta-po-05v.sys.comcast.net[220.127.116.11]>: Client host rejected: Connection rejected due to site policy
Last-attempt-Date: Wed, 06 May 2020 18:51:21 +0000
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An organization that I belong to has changed its email hosting service from FutureQuest to ZOHO. The IT administrator tells me that he made the necessary change in the mx record (whatever that is). But whenever I send email to that domain, I get a perminent error message from Comcast. It appears to me that Comcast is trying to send to FutureQuest rather than ZOHO. What can I do to get Comcast to recognize the change?
I'd rather not post the name of the domain or any specific email address in that domain on this public forum, but I'd be happy to provide it to someone who can help, probably a Comcast employee.
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