ph91.de
  • Home
  • About me
  • Categories
    • Software Development
    • New Zealand
    • Music
    • Tech & IT
    • Sports
    • Dublin
    • Junk
  • Contact
  • Disclaimer
ph91.de
ph91.de
  • Home
  • About me
  • Categories
    • Software Development
    • New Zealand
    • Music
    • Tech & IT
    • Sports
    • Dublin
    • Junk
  • Contact
  • Disclaimer
  • Tech & IT

Configure a postfix mailserver correctly (1blu)

  • 10. September 2018
  • Philipp

For the last few months, we were having problems with the mail server at surf-club-augsburg.de: mails to live.com/web.de/gmx.de/t-online.de couldn’t be sent because their mail server wouldn’t accept emails sent by our mail server. It appeared that big email-Providers have quite a lot of rules for accepting incoming mails. In the end, we fixed our setup, so that we can make sure our mails reach their destination.

  1. Create a real subdomain for you mailserver (nothing like vxxxxx.1blu.de). In our case it was mail.surf-club-augsburg.de
  2. Change your postfix configuration file /etc/postfix/main.cf:
    1. Access your server IP with SSH and the credential root/your-initial-password
    2. Install nano: sudo apt-get install nano
    3. Set smtp_bind_address = your.ip.address.
    4. Change myhostname =  mail.your-tld.de
    5. Reload your config with postfix reload command
  3. Create DNS entries for you mailing domain (A-Record, MX-Record) here: https://login.1blu.de/pdomainnschange.php
  4. Demand a PTR (IP => domain) record for your mailing-domain because some Providers (e.g. web.de/gmx.de) won’t accept your mails unless such an entry exists. At 1blu you NEED to write a mail to support in order to do that. You can’t do it yourself.
  5. Ask providers to remove you from their blacklist. At least at Microsoft and t-online, I needed to demand them to remove our server from the blacklist. Actually, that worked quite quick and simple!

After finishing this checklist, your mailserver shouldn’t have problems anymore. Of course, this checklist can’t cover every aspect. There might be other pitfalls in your specific situation. A good tool to check your mailserver status is https://mxtoolbox.com/

Related Topics
  • 1blu
  • mailserver
  • mx
  • postfix
  • ptr
Philipp

Previous Article
  • Software Development

Technical tip: “Can’t find module typescript”

  • 10. September 2018
  • Philipp
View Post
Next Article
  • Software Development

Unexpected C# Behaviour

  • 16. September 2018
  • Philipp
View Post
86 comments

Comments navigation

Older comments
  1. thc gummies says:
    11. July 2025 at 14:52

    thc gummies

  2. best disposable vaporizers says:
    11. July 2025 at 15:07

    best disposable vaporizers area 52

  3. live rosin gummies says:
    11. July 2025 at 16:10

    live rosin gummies area 52

  4. best indica thc weed pens says:
    11. July 2025 at 16:20

    best indica thc weed pens area 52

  5. hybrid disposable says:
    11. July 2025 at 16:20

    hybrid disposable area 52

  6. indica gummies says:
    11. July 2025 at 16:40

    indica gummies area 52

  7. live resin carts says:
    11. July 2025 at 16:56

    live resin carts area 52

  8. thca diamonds says:
    11. July 2025 at 17:03

    thca diamonds area 52

  9. best sativa thc edibles says:
    11. July 2025 at 17:09

    best sativa thc edibles area 52

  10. snow caps says:
    11. July 2025 at 17:10

    snow caps area 52

  11. buy pre rolls online says:
    11. July 2025 at 17:19

    buy pre rolls online area 52

  12. Психолог онлайн says:
    11. July 2025 at 17:21

    Б17 психологи. Психиатр онлайн 706 оценок

  13. best thca says:
    11. July 2025 at 17:25

    best thca area 52

  14. microdosing edibles says:
    11. July 2025 at 17:36

    microdosing edibles area 52

  15. thc tincture says:
    11. July 2025 at 17:44

    thc tincture area 52

  16. thc oil says:
    11. July 2025 at 17:47

    thc oil area 52

  17. thc sleep gummies says:
    11. July 2025 at 17:48

    thc sleep gummies area 52

  18. live resin says:
    11. July 2025 at 18:08

    live resin area 52

  19. best sativa thc carts says:
    11. July 2025 at 18:33

    best sativa thc carts area 52

  20. thc gummies for anxiety says:
    11. July 2025 at 18:47

    thc gummies for anxiety area 52

  21. thc pen says:
    11. July 2025 at 18:59

    thc pen area 52

  22. thca disposable says:
    11. July 2025 at 20:33

    thca disposable area 52

  23. 1 gram carts says:
    11. July 2025 at 20:47

    1 gram carts area 52

  24. Психолог онлайн says:
    12. July 2025 at 11:54

    Кпт курган. Психолог онлайн 872 оценок

  25. Психолог онлайн says:
    12. July 2025 at 18:15

    Кпт курган. Психиатр онлайн 920 оценок

  26. Психолог онлайн says:
    12. July 2025 at 23:27

    Сервис по подбору психолога Психотерапевт онлайн 343 оценок

  27. chemodan632 says:
    13. July 2025 at 23:08

    Как сложить юбку чтобы она не помялась Спортивная экипировка в чемодане. 171 благодарностей

  28. weed pen says:
    14. July 2025 at 06:02

    XL

  29. CBD Gummies 2025: Best CBD Gummies for Pain says:
    14. July 2025 at 22:56

    HW

  30. mood thc gummies says:
    17. July 2025 at 18:41

    mood thc gummies area 52

  31. thcv gummies says:
    17. July 2025 at 20:38

    thcv gummies area 52

  32. best THC gummies says:
    18. July 2025 at 16:34

    Good shout.

  33. Психолог says:
    19. July 2025 at 15:28

    Психолог оценили 6875 раз

  34. Дизайнчеловека54 says:
    20. July 2025 at 12:40

    Дизайн человека 32 9
    51 Ворота Дизайн человека
    29 Ворота Дизайн человека
    46 Ворота Дизайн человека
    24 Ворота Дизайн человека
    63 Ворота Дизайн человека
    46 Ворота Дизайн человека
    64 Ворота Дизайн человека
    29 Ворота Дизайн человека
    38 Ворота Дизайн человека
    8 Ворота Дизайн человека
    22 Ворота Дизайн человека

  35. Дизайнчеловека25 says:
    23. July 2025 at 13:26

    Дизайн человека 36 43
    43 Ворота Дизайн человека
    53 Ворота Дизайн человека
    50 Ворота Дизайн человека
    31 Ворота Дизайн человека
    6 Ворота Дизайн человека
    9 Ворота Дизайн человека
    38 Ворота Дизайн человека
    21 Ворота Дизайн человека
    22 Ворота Дизайн человека
    21 Ворота Дизайн человека
    56 Ворота Дизайн человека

  36. Дизайнчеловека12 says:
    24. July 2025 at 20:29

    Дизайн человека 59 51
    34 Ворота Дизайн человека
    8 Ворота Дизайн человека
    13 Ворота Дизайн человека
    18 Ворота Дизайн человека
    26 Ворота Дизайн человека
    18 Ворота Дизайн человека
    7 Ворота Дизайн человека
    31 Ворота Дизайн человека
    56 Ворота Дизайн человека
    48 Ворота Дизайн человека
    18 Ворота Дизайн человека

Comments navigation

Older comments

Leave a Reply

Your email address will not be published. Required fields are marked *

Dev profiles
  • BitBucket
  • Github
  • Stackoverflow
Side Projects
  • NMF
  • Speed-kini.de
  • Sudoku Solver
  • Windwarner
Archive
ph91.de
Blog by Philipp Schreitmüller

Input your search keywords and press Enter.