Why did Canon printers stop working?

Question

Email

This morning, all Canon 2520s abruptly stopped working to send scans to the mail. There were no prerequisites for this. From early morning it was still working, after an hour - everything was refused. Nobody touched the network, it works. Network printing is working fine. Sending to a network folder and to an email address does not work. While writing it the problem on one more HP 425 was found out. Mail goes normally. Everything goes from the sending address, it also comes to it. Error after unsuccessful sending is displayed 099.

Answer 1

In general, the problem was with dns. He just didn't work well. Restart helped.