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Updated A mail server's 101 (markdown)

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Jean-Denis Vauguet 2020-06-13 06:28:06 +02:00
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docs/content/a-mail-server's-101.md
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@ -125,7 +125,7 @@ My MTA will thus have to support two kinds of Submission:
┌────────────────────┐ ┌┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┐
Me ---------------> ┤ ├ -----------------> ┊ ┊
│ My MTA │ ┊ Third-party MTA ┊
Me <--------------- ┤ ├ <----------------- ┊ ┊
│ ├ <----------------- ┊ ┊
└────────────────────┘ └┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┘
┗━━━━━━━━━━ Inward Submission ━━━━━━━━━━┛
```
@ -162,6 +162,18 @@ Granted it's still very difficult enforcing encryption between MTAs (Transfer/Re
- It does not enable Explicit TLS (STARTTLS) on port 25 by default. One may enable it through advanced custom configuration, either as a replacement (bad!) or as a supplementary mean of secure Inward Submission.
- One may also secure Inward Submission using advanced encryption scheme, such as DANE/DNSSEC and/or MTA-STS.
Overall, `docker-mailserver`'s default configuration for SMTP looks like this:
```txt
┏━━━━ Outward Submission ━━━━┓
┌────────────────────┐ ┌┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┐
Me -- cleartext --> ┤(25) (25)├ --- cleartext ---> ┊ ┊
Me -- STARTTLS ---> ┤(587) My MTA │ ┊ Third-party MTA ┊
│ (25)├ <---cleartext ---- ┊ ┊
└────────────────────┘ └┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┘
┗━━━━━━━━━━ Inward Submission ━━━━━━━━━━┛
```
### Retrieval - IMAP
A MUA willing to fetch an email from a mail server will most likely communicate with its [IMAP](https://en.wikipedia.org/wiki/IMAP) server. As with SMTP described earlier, communication will take place in the form of data packets exchanged over a network that both the client and the server are connected to. The IMAP protocol makes the server capable of handling _Retrieval_.