Unable to connect to smtp server, connection timed out

Unable to connect to smtp server, connection timed out

Hi Team,

I am facing below issue, while sending out emails from thunderbird client. It used to work, facing this issue from morning.

Error:

Sending of the message failed.
The message could not be sent because the connection to Outgoing server (SMTP) smtp.zoho.com timed out. Try again.

Thanks,
Anil Maram