Most residential ISPs block port 25. Try port 587 first, then perhaps 465 for SMTP over TLS.
On April 22, 2024 2:55:07 PM PDT, "Pierre Houdouin" <users@sogo.nu> wrote: > >Hello, >My university uses Sogo to host the email and I wanted to put the mail address >on Thunderbird. >You can see attached the parameters of the sogo email and the parameters I put >on Thunderbird. >My problem is that while I am able to receive emails, I am unable to answer, >and I keep getting the following error : > >Sending of the message failed. >The message could not be sent because connecting to the Outgoing server (SMTP) >smtp-app.centralesupelec.fr failed. The server may be unavailable or is >refusing SMTP connections. Please verify that your Outgoing server (SMTP) >settings are correct and try again > >Could you please provide me with insights about how to solve this problem? >Thank you >Pierre HOUDOUIN
