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Mail Servers

  1. Blocking sender email addresses with Postfix
    How to block sender e-mail addresses and domains in Postfix to effectively eliminate marketing spam.
  2. How to set up SPF checking in Postfix
    Configure Postfix to check SPF records and fight e-mail spoofing.
  3. DNS SPF Records
    How to use SPF records to increase the likelihood that your e-mails will be received and not go to spam.
  4. Rate Limiting with Postfix
    Rate limiting your postfix server to limit the amount of e-mail a single user can send.
  5. Adding a PTR Record for an Elastic IP on AWS
    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. Running An SMTP Server On An EC2 Instance
    How to configure a SMTP server with letsencrypt on an amazon EC2 instance.
  7. Using Lets Encrypt With Postfix
    How to configure Postfix to use Lets Encrypt certificates.
  8. Dovecot Debugging and Logging
    How to debug problems with a Dovecot server using log files.