Update documentation for Implicit TLS (#16220)
As per RFC 8314, it is now recommended to prefer TLS over STARTTLS. Fix #16160 Signed-off-by: Andrew Thornton <art27@cantab.net>
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					 2 changed files with 4 additions and 4 deletions
				
			
		|  | @ -1387,8 +1387,8 @@ PATH = | |||
| ;; Mail server | ||||
| ;; Gmail: smtp.gmail.com:587 | ||||
| ;; QQ: smtp.qq.com:465 | ||||
| ;; Using STARTTLS on port 587 is recommended per RFC 6409. | ||||
| ;; Note, if the port ends with "465", SMTPS will be used. | ||||
| ;; As per RFC 8314 using Implicit TLS/SMTPS on port 465 (if supported) is recommended, | ||||
| ;; otherwise STARTTLS on port 587 should be used. | ||||
| ;HOST = | ||||
| ;; | ||||
| ;; Disable HELO operation when hostnames are different. | ||||
|  |  | |||
|  | @ -550,9 +550,9 @@ Define allowed algorithms and their minimum key length (use -1 to disable a type | |||
| - `DISABLE_HELO`: **\<empty\>**: Disable HELO operation. | ||||
| - `HELO_HOSTNAME`: **\<empty\>**: Custom hostname for HELO operation. | ||||
| - `HOST`: **\<empty\>**: SMTP mail host address and port (example: smtp.gitea.io:587). | ||||
|   - Using opportunistic TLS via STARTTLS on port 587 is recommended per RFC 6409. | ||||
|   - As per RFC 8314, if supported, Implicit TLS/SMTPS on port 465 is recommended, otherwise opportunistic TLS via STARTTLS on port 587 should be used. | ||||
| - `IS_TLS_ENABLED` :  **false** : Forcibly use TLS to connect even if not on a default SMTPS port. | ||||
|   - Note, if the port ends with `465` SMTPS/SMTP over TLS will be used despite this setting. | ||||
|   - Note, if the port ends with `465` Implicit TLS/SMTPS/SMTP over TLS will be used despite this setting. | ||||
|   - Otherwise if `IS_TLS_ENABLED=false` and the server supports `STARTTLS` this will be used. Thus if `STARTTLS` is preferred you should set `IS_TLS_ENABLED=false`. | ||||
| - `FROM`: **\<empty\>**: Mail from address, RFC 5322. This can be just an email address, or | ||||
|    the "Name" \<email@example.com\> format. | ||||
|  |  | |||
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