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I am trying to set my email FROM header field each time I send an email.

First I create a text file:

To: myemail@gmail.com
Content-Type: text/plain; charset=us-ascii>
From: sender@domain.com
Subject: nothing special

Main body here


Some other info


bye

The I send it with sendmail using:

cat testMail.txt | ./sendmail -t myemail@gmail.com

The mail is successfully sent. However, it is then returned by google with the error message:

Your email has been blocked because the
    sender is unauthenticated. Gmail requires all senders to
    authenticate with either SPF or DKIM.    Authentication results: DKIM = did not pass SPF
    [localhost.localdomain] with ip: [my.ip] = did not pass

Why is the domain localhost.localdomain being reported ? The returned mail has the correct From field in the email header, so why is it being sent with the incorrect domain name ?

Help here is greatly appreciated.

user10709800
  • 13

1 Answers1

-1

You have to set up the hostname and DNS records.

There is a guide here: https://centminmod.com/getstarted.html

And discussion here: https://community.centminmod.com/threads/emails-localdomain.12205/

MaximilianKohler
  • 1