This e-mail address does not exist, I cannot write to this.
I have got this message:
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
host gmail-smtp-in.l.google.com [18.104.22.168]
SMTP error from remote mail server after RCPT TO:
550-5.1.1 The email account that you tried to reach does not exist. Please try
550-5.1.1 double-checking the recipient’s email address for typos or
550-5.1.1 unnecessary spaces. Learn more at
550 5.1.1 https://support.google.com/mail/?p=NoSuchUser q15si14885913wrc.256 – gsmtp