Not sending emails?!

When I use Gmail account it works normally with syncing only after trying to send an email it shows an error from SMTP and I have done all the troubleshoots u provide on our community and still doing the same thing
Plz advice

Thx

Did you completely disable any anti-virus, firewall, proxy or VPN and try again?

Can you give me the tips to do that, I’m already disabled it but to make sure that nothing wrong

Thx

Completely disable any anti-virus, firewall, proxy or VPN.

In eM Client, send a message.

Did it send?