Nobody helps me with this problem

Nobody helps me with this problem, it won’t let me send email, I get this error

Screenshot_5

Help Help

Hello

Login with SSH and check

telnet yourmainserver.com 25

and check Mail Server SSL
using: //email/testTo:


And then check the

systemctl status postfix
systemctl status dovecot

Check Snappy Mail Admin
I can't send mail - #6 by josephgodwinke.


Also try login with IMAP or POP3 to Outlook or any other mail clients. Use the proper credentials and try sending email from these external clients.

Nothing works for me at all

If you have tried this, you should post the results screenshot then someone can understand and help you. Otherwise who will be interested.