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Martin AJ
Asked: 2018-02-19 03:24:05 +0800 CST

Why the email I send goes into spam?

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I use ubuntu 16.04 on my server and recently I've installed postfix MTA on my server following this tutorial.

The problem is the email I send goes into spam, not inbox. Any idea what's wrong and how can I fix it? Noted that my domain name isn't into black list. Because few months ago, I did in on another server and emails sent as well (they went into inbox).

Also I send email via command line interface like this:

echo "This is the body of the email" | mail -s "This is the subject line" <my_email>

What should I do now?

Also this is my /etc/postfix/main.cf file on the server and this is my DNS records on cloudflare:

enter image description here

server mail email postfix 16.04

1 Answers

  1. In the last year, several mail providers (most notably GMail) have started to put all Emails received without TLS into the spam folder. Try adding the following lines to your postfix configuration:

    smtp_tls_security_level = may
smtp_tls_loglevel = 1

    After doing systemctl reload postfix follow the instructions at https://www.port25.com/authentication-checker/ to validate your setup.

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