How to change port 25 [SOLVED]

[rogernet]

My vps blocks port 25 and I can't send emails, I receive normally. How do I change port 25 to another port that I can send emails to. Thanks.
KeyHelp 21.3
Ubuntu 20.04
Roundcube

[Florian]

Hallo,

for sending mails you can use port 587 that is active by default

[rogernet]

Hallo,

for sending mails you can use port 587 that is active by default

Thanks for the reply my friend. How do I leave only port 587 for sending emails?

[Florian]

Hallo,

Port 25 must always be open because mailservers communicate via this port.

[rogernet]

Solved. Hetzner enabled port 25 and it is working now. Thanks.