Mail Servers

  1. Configure Postfix to check SPF records and fight e-mail spoofing.
  2. How to use SPF records to increase the likelihood that your e-mails will be received and not go to spam.
  3. How to block sender e-mail addresses and domains in Postfix to effectively eliminate marketing spam.
  4. Rate limiting your postfix server to limit the amount of e-mail a single user can send.
  5. To add or update a PTR record for an AWS IP, you will need to contact Amazon through the: Request to remove email sending limitations form. Read more in this article.
  6. How to configure a SMTP server with letsencrypt on an amazon EC2 instance.
  7. How to configure Postfix to use Lets Encrypt certificates.
  8. How to debug problems with a Dovecot server using log files.