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computing:mailserver [2022/12/11 06:26] – oemb1905 | computing:mailserver [2023/08/06 18:42] (current) – oemb1905 | ||
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* **mailserver** | * **mailserver** | ||
* **Jonathan Haack** | * **Jonathan Haack** | ||
- | * **Haack' | + | * **Haack' |
- | * **webmaster@haacksnetworking.org** | + | * **webmaster@haacksnetworking.org** |
------------------------------------------- | ------------------------------------------- | ||
- | + | ||
- | // | + | // |
------------------------------------------- | ------------------------------------------- | ||
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Now, set up the server block for your mail server' | Now, set up the server block for your mail server' | ||
- | sudo nano /etc/apache2/sites-available/ | + | sudo nano /etc/nginx/conf.d/ |
sudo mkdir -p / | sudo mkdir -p / | ||
| | ||
Line 253: | Line 253: | ||
< | < | ||
< | < | ||
+ | | ||
+ | To set up email header and/or body checks to prevent spam: | ||
- | In general, be careful of setting your own TXT records for dmarc and spf with p=reject and -all because recipient' | + | sudo apt install postfix-pcre |
+ | sudo nano / | ||
+ | < | ||
+ | < | ||
+ | |||
+ | You will then need to configure | ||
- | --- // | + | sudo nano / |
+ | </free mortgage quote/ | ||
+ | </repair your credit/ | ||
+ | sudo postmap / | ||
+ | sudo nano / | ||
+ | </free mortgage quote/ | ||
+ | </repair your credit/ | ||
+ | sudo postmap / | ||
+ | |||
+ | In general, be careful of setting your own TXT records for dmarc and spf with p=reject and -all because recipient' | ||
+ | |||
+ | sudo apt install opendmarc | ||
+ | <no to db configure> | ||
+ | sudo nano / | ||
+ | < | ||
+ | < | ||
+ | < | ||
+ | < | ||
+ | < | ||
+ | <Socket local:/ | ||
+ | sudo mkdir -p / | ||
+ | sudo chown opendmarc: | ||
+ | sudo chmod 750 / | ||
+ | sudo adduser postfix opendmarc | ||
+ | sudo systemctl restart opendmarc | ||
+ | |||
+ | Now, configure postfix to work with openDMARC. Add the openDMARC socket to the milter block you created earlier. | ||
+ | |||
+ | sudo nano / | ||
+ | < | ||
+ | < | ||
+ | < | ||
+ | < | ||
+ | sudo systemctl restart postfix | ||
+ | |||
+ | This about covers everything. The only missing part is how to get past picky microsoft users and/or automate or simplify account creation. Okay, to view and/or delete messages from postfix mailq: | ||
+ | |||
+ | mailq | ||
+ | postcat -q E900C4780073 | ||
+ | postsuper -d E900C4780073 | ||
+ | postsuper -d ALL | ||
+ | |||
+ | If you have issues, it's good to be familiar with some different uses of the '' | ||
+ | |||
+ | dig txt +short _dmarc.jonathanhaack.com | ||
+ | dig txt +short _dmarc.haacksnetworking.org | ||
+ | dig default._domainkey.jonathanhaack.com txt | ||
+ | dig default._domainkey.haacksnetworking.org txt | ||
+ | dig txt +short jonathanhaack.com | ||
+ | dig txt +short haacksnetworking.org | ||
+ | dig -x 8.28.86.130 +short | ||
+ | dig -x 8.28.86.125 +short | ||
+ | sudo opendkim-testkey -d jonathanhaack.com -s default -vvv | ||
+ | sudo opendkim-testkey -d haacksnetworking.org -s default -vvv | ||
+ | |||
+ | Also, please note that the above applies to clients connecting to the domain. If you intend to also host websites/ | ||
+ | |||
+ | echo "Hi, I am testing the subdomain email health." | ||
+ | |||
+ | Setting up dovecot-sieve. | ||
+ | |||
+ | sudo apt install dovecot-sieve dovecot-managesieved | ||
+ | sudo nano / | ||
+ | |||
+ | Set to: | ||
+ | |||
+ | protocols = imap lmtp sieve | ||
+ | |||
+ | Then, open | ||
+ | |||
+ | sudo nano / | ||
+ | |||
+ | Set to: | ||
+ | |||
+ | protocol lda { | ||
+ | mail_plugins = $mail_plugins sieve | ||
+ | } | ||
+ | |||
+ | Finally, | ||
+ | |||
+ | sudo nano / | ||
+ | |||
+ | Which should be: | ||
+ | |||
+ | protocol lmtp { | ||
+ | mail_plugins = quota sieve | ||
+ | } | ||
+ | |||
+ | Restart your services '' | ||
+ | |||
+ | sudo nano / | ||
+ | |||
+ | An example block: | ||
+ | |||
+ | mailbox Drafts { | ||
+ | auto = create | ||
+ | special_use = \Drafts | ||
+ | } | ||
+ | |||
+ | Simply add the '' | ||
+ | |||
+ | --- // |