computing:mailserver
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| computing:mailserver [2025/04/23 20:55] – oemb1905 | computing:mailserver [2025/05/15 19:21] (current) – oemb1905 | ||
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| - | This tutorial is for users of Debian GNU/Linux who want to set up a proper email server.. This tutorial assumes you know how to set up A, AAAA, SPF, DKIM, DMARC, MX, and PTR records. Set an A record for example.org and mail.example.org. If you don't know how, then learn up, and do not proceed. //Thanks to LinuxBabe for a great jumping off point//. Let's begin by editing our hosts file '' | + | This tutorial is for users of Debian GNU/Linux who want to set up a proper email server.. This tutorial assumes you know how to set up A, AAAA, SPF, DKIM, DMARC, MX, and PTR records. Set an A record for example.org and mail.example.org |
| 127.0.1.1 example.org example | 127.0.1.1 example.org example | ||
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| + | You also need to make sure that your spf policy is not set to reject emails by default. | ||
| + | |||
| + | nano / | ||
| + | | ||
| + | Make sure that '' | ||
| + | |||
| + | HELO_reject = False | ||
| + | Mail_From_reject = False | ||
| Now, it is time to set up DKIM on your server. After creating the DKIM record/key on your server, you will need to create a corresponding TXT record for it to establish that anything over smtp with that signature is, in fact, you/your server. Let's install opendkim with '' | Now, it is time to set up DKIM on your server. After creating the DKIM record/key on your server, you will need to create a corresponding TXT record for it to establish that anything over smtp with that signature is, in fact, you/your server. Let's install opendkim with '' | ||
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| AuthservID OpenDMARC | AuthservID OpenDMARC | ||
| TrustedAuthservIDs mail.yourdomain.com | TrustedAuthservIDs mail.yourdomain.com | ||
| - | RejectFailures | + | RejectFailures |
| IgnoreAuthenticatedClients true | IgnoreAuthenticatedClients true | ||
| RequireHeaders true | RequireHeaders true | ||
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| nano / | nano / | ||
| < | < | ||
| + | |||
| + | To setup autodiscovery, | ||
| + | |||
| + | _imap._tcp | ||
| + | _submission._tcp | ||
| + | _imaps._tcp | ||
| + | _submissions._tcp | ||
| + | _autodiscover._tcp | ||
| + | autodiscover | ||
| + | autodiscover | ||
| + | |||
| + | After that, setup your '' | ||
| + | |||
| + | sudo nano / | ||
| | | ||
| - | To check record health after you set your DNS records, you can do the following: | + | Inside that file, enter something similar to this entry below, obviously adjusting for your priority, weight, and desired client configuration behavior: |
| + | |||
| + | <?xml version=" | ||
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| + | Pretty much everything one needs is now setup. | ||
| | | ||
| dig txt +short _dmarc.jonathanhaack.com | dig txt +short _dmarc.jonathanhaack.com | ||
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| These tools prove helpful if/when emails get stuck, etc. | These tools prove helpful if/when emails get stuck, etc. | ||
| - | --- // | + | --- // |
computing/mailserver.1745441726.txt.gz · Last modified: 2025/04/23 20:55 by oemb1905
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