I have 2 clients of mine who are sisters, both live in the same area and both use the same ISP. About 6 days ago, both of them began to experience an issue where they could not send out any mail.
The mail server is running fine and nothing was changed, so my question is, did the ISP block this access to prevent spam or something?
We've tried mail.domain.com, IP's, everything in the smtp field and nothing works.
