Sending emails to Google mail

This is the mail system at host tilde.team.

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

<redacted@gmail.com>: host gmail-smtp-in.l.google.com[172.217.197.26] said:
    550-5.7.1 [167.114.7.65      11] Our system has detected that this message
    is 550-5.7.1 not RFC 5322 compliant: 550-5.7.1 'From' header is missing.
    550-5.7.1 To reduce the amount of spam sent to Gmail, this message has been
    550-5.7.1 blocked. Please visit 550-5.7.1
    https://support.google.com/mail/?p=RfcMessageNonCompliant 550 5.7.1 and
    review RFC 5322 specifications for more information. v11si2193399qvs.190 -
    gsmtp (in reply to end of DATA command)


tags: sending-emails-to-google, email, shitpost