7e09d8f537
Add the submissions autodiscovery SRV DNS record for implicit TLS in SMTP (submission) connections according to [RFC 8314](https://www.rfc-editor.org/rfc/rfc8314#section-5.1).
18 lines
923 B
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18 lines
923 B
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Autodiscovery
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=============
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`RFC6186 <https://www.rfc-editor.org/rfc/rfc6186>`_ allows supporting email clients to automatically discover SMTP / IMAP addresses
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of the mailserver. For that, the following records are required:
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================= ==== ==== ======== ====== ==== =================
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Record TTL Type Priority Weight Port Value
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================= ==== ==== ======== ====== ==== =================
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_submission._tcp 3600 SRV 5 0 587 mail.example.com.
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_submissions._tcp 3600 SRV 5 0 465 mail.example.com.
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_imap._tcp 3600 SRV 5 0 143 mail.example.com.
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_imaps._tcp 3600 SRV 5 0 993 mail.example.com.
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================= ==== ==== ======== ====== ==== =================
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Please note that only a few MUAs currently implement this. For vendor-specific
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discovery mechanisms `automx <https://github.com/rseichter/automx2>`_ can be used instead.
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