SMTP Connection Error

SMTP Connection Error

Hello,

There is an outgoing SMTP connection error that we have noticed for about 2 days.
Our 2 email programs that were working fine in different cities suddenly started returning errors.
There is no problem with incoming, it only covers outgoing. 
It says Could not connect to SMTP server.
This has happened to other zoho users as well, does anyone know why?
3 diffrent pc, outlook and thunderbird same.

Best regards.


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