Portal Home > Knowledgebase > Email > ISP blocking out going SMTP port 25

ISP blocking out going SMTP port 25


Some ISP's are now restricting outgoing e-mail through third-party e-mail accounts. You can check their policies and see if they have a preferred method for sending outgoing e-mail.
Many ISPs allow you to send only through their system to prevent people for using their e-mail servers for spamming.

If you're receiving error messages from your e-mail client such as Outlook and Thunderbird, "error: could not connect to your outgoing SMTP server" chances are your ISP is blocking port 25. Port 25 is a common outgoing port for e-mail.

Possible solution: By changing your outgoing port from 25 to port 26, this could allow you to bypass your ISP mail servers.

Was this answer helpful?

Add to Favourites Add to Favourites    Print this Article Print this Article

Also Read

Powered by WHMCompleteSolution