I can get my mail but can't send any?
Symptom: on any email
client, when sending mail, one gets an SMTP
error saying: can't connect to the server... or relaying denied.
Reason: The new mail.his.com server does not support POP-BEFORE-SENDMAIL authentication anymore .
In your email software, check in the Outgoing Mail Server
Settings to see if SMTP authentication is enabled. if it is not, enable
it. This section of your settings may be called "Outgoing Server"
or "SMTP Server" ... enter your username and password here.
See our Articles about Enabling SMTP Authentication: https://support.his.com/kb/kb/browse/001822
If SMTP authentication is enabled, but you can't send any mail
at all (not even to email@example.com), you will also need to change the SMTP
server port number to 587.
Most ISPs (Cox or Starpower, Comcast, and now Verizon) are filtering port 25 (SMTP port) as an anti-spam measure.