Some Domains Hosted at Web.com
When suspicious email traffic is detected, a mail provider may block all messages coming from that domain. Sometimes this happens to Cornell email.
This article applies to: Email for Faculty and Staff
Sometimes many different web sites share one email provider. This is the case with Web.com. So, if Cornell email is temporarily blocked from any one of Web.com's clients, it is blocked from all.
If you see a message like the following, it means your message has been blocked.
----- The following addresses had permanent fatal errors ----- <email@example.com>
(reason: 553 5.3.0 18.104.22.168 Your message was rejected for possible spam/virus content.Please ask your email provider to visit http://emailadmin.registeredsite.com for resolution.)
The following domains are some of the ones most commonly emailed by people using the Cornell email system, and so email sent from Cornell to someone at these domains is most likely to be affected when Web.com blocks Cornell email. This list does not encompass all domains hosted with Web.com. It is an attempt to present the ones most commonly caught by such an email block.