Still does not work. get this error:
This is the mail system at host luzuk.
I’m sorry to have to inform you that your message could not be delivered to one or more recipients. It’s attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can delete your own text from the attached returned message.
The mail system
<luzu[email protected]> (expanded from <[email protected]>): host
gmail-smtp-in.l.google.com[22.214.171.124] said: 550-5.7.1 This message does
not have authentication information or fails to pass 550-5.7.1
authentication checks. To best protect our users from spam, the 550-5.7.1
message has been blocked. Please visit 550-5.7.1
https://support.google.com/mail/answer/81126#authentication for more 550
5.7.1 information. h18si8569978ede.228 – gsmtp (in reply to end of DATA