Aplikacja Mail nie wysyła wiadomości e-mail.

I am experiencing a problem with the Mail app on iOS. The issue is that incoming mail is received normally (I have both Gmail and iCloud accounts connected), which is fine, but when I try to send an email, it doesn’t go through, regardless of the account I’m using. I’ve checked all SMTP settings, both automatic and manually entered, but the outgoing mail servers remain offline.