105 lines
3.8 KiB
Markdown
105 lines
3.8 KiB
Markdown
# joeac.net
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Joe Carstairs' public Internet presence
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To install:
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```sh
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wget -O- https://git.joeac.net/joeac/joeac.net/raw/branch/main/install.sh | sh
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```
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## DNS setup
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A/AAAA DNS records are added automatically by `make install`, but in order to
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get `mox` working as an email server, you'll have to manually add the following
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DNS records.
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Deliver mail for mail.joeac.net to mail.joeac.net:
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```
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mail.joeac.net. MX 10 mail.joeac.net.
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```
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All emails from the email server will be signed with two DKIM keys. So that
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clients can verify the authenticity of the messages, provide these keys as TXT
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records:
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```
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2026a._domainkey.mail.joeac.net. TXT v=DKIM1;h=sha256;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvYfjrzmYgBtYofzBwI80aiW98+M2g6z+gd1Iwz9g0y30rPFNTctFn9GwBNuYBgZiZxB+sqjEbPMbr3li/R7i0A9t/KbNNJhkNC+4IjKJjk+jw1CXm4vXOUa4YSYWwy7NVYTH/QwZGz6fwjVM7YvDnnE4gG2NwrVx+AXlONt2R1G+qgV6HAIIvVi8T0yCjjqEc5B5bKlqk0XU9vSyUFJhhKnR/KNRe79C+H9GWJzcU7HUCmIHX04Xi0JeB/wm3weF1xjtGTsWyy5BmHHsfWGqSr2Dbg5o6AI5W0h4VkQ4QzdEYGVQ9ZBDyqFQwQFXLn0oHZjCD/vFzPOPdM5pxF/OgwIDAQAB
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2026b._domainkey.mail.joeac.net. TXT v=DKIM1;h=sha256;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzcrk9FUt6AdrvnAP3KawuOTLw7uL5SJ+ZYmShuz41zwM6bPQteGSSwddFXIxcqVlJrdFahrK4KvHX/sw/hWVfZoPLDdwsGN5eI8cqQjNDE+JDu9BbPlTituva4Hkve0hbAKDqA8jmbcZg6aU7b44Kzq8UpWAlPO273Rq2tsbCBcITt8B3NFoeY9CSsZU1LqGl855GUtaNyhlPaAvfab3Q9/4wyusPhCHlBYaRK+ZzuSMs5KEOG6n4kbZfMVi2+4c/bPU5PdTuyvbSIEqjNH4TpfatE0I9ubGv0WbAzr5EZbv5+xtukZ/dIisPPMjn1AbjpSJYNYr2OYgey6+WvzRmQIDAQAB
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```
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Specify the MX host is allowed to send for our domain and for itself (for DSNs).
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~all means softfail for anything else, which is done instead of -all to prevent
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older mail servers from rejecting the message because they never get to looking
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for a dkim/dmarc pass.
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```
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mail.joeac.net. TXT v=spf1 ip4:217.155.190.42 ip6:fdc9:6aec:7a18:0:2e0:4cff:fe61:9b17 mx ~all
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```
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Emails that fail the DMARC check (without aligned DKIM and without aligned SPF)
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should be rejected, and request reports. If you email through mailing lists that
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strip DKIM-Signature headers and don't rewrite the From header, you may want to
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set the policy to p=none.
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```
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_dmarc.mail.joeac.net. TXT v=DMARC1;p=reject;rua=mailto:dmarcreports@mail.joeac.net!10m
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```
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Remote servers can use MTA-STS to verify our TLS certificate with the WebPKI
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pool of CA's (certificate authorities) when delivering over SMTP with
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STARTTLSTLS.
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```
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mta-sts.mail.joeac.net. CNAME mail.joeac.net.
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_mta-sts.mail.joeac.net. TXT v=STSv1; id=20260705T153220
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```
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Request reporting about TLS failures.
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```
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_smtp._tls.mail.joeac.net. TXT v=TLSRPTv1; rua=mailto:tlsreports@mail.joeac.net
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```
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Client settings will reference a subdomain of the hosted domain, making it
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easier to migrate to a different server in the future by not requiring settings
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in all clients to be updated.
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```
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clientsettings.mail.joeac.net. CNAME mail.joeac.net.
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```
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Autoconfig is used by Thunderbird. Autodiscover is (in theory) used by
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Microsoft.
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```
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autoconfig.mail.joeac.net. CNAME mail.joeac.net.
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_autodiscover._tcp.mail.joeac.net. SRV 0 1 443 mail.joeac.net.
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```
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For secure IMAP and submission autoconfig, point to mail host.
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```
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_imaps._tcp.mail.joeac.net. SRV 0 1 993 mail.joeac.net.
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_submissions._tcp.mail.joeac.net. SRV 0 1 465 mail.joeac.net.
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```
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Next records specify POP3 and non-TLS ports are not to be used. These are
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optional and safe to leave out (e.g. if you have to click a lot in a DNS admin
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web interface).
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```
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_imap._tcp.mail.joeac.net. SRV 0 0 0 .
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_submission._tcp.mail.joeac.net. SRV 0 0 0 .
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_pop3._tcp.mail.joeac.net. SRV 0 0 0 .
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_pop3s._tcp.mail.joeac.net. SRV 0 0 0 .
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```
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Optional: You could mark Let's Encrypt as the only Certificate Authority allowed
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to sign TLS certificates for your domain.
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```
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mail.joeac.net. CAA 0 issue "letsencrypt.org"
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```
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