docs: update Mail

Mail.md

@@ -2,7 +2,7 @@
 title: Mail
 description: Overview of mail settings, and sending system mail.
 published: true
-date: 2022-10-05T11:13:02.325Z
+date: 2022-10-12T16:28:10.053Z
 tags: config, mail
 editor: markdown
 dateCreated: 2021-08-27T14:00:37.062Z
@@ -26,16 +26,13 @@ sender: matan@pukeko.xyz
 Port `465` with SSL should work, though untested.
 
 ## System mail via `sendmail`
-Gentoo mailing is... weird. Postfix works as is (see [here](https://wiki.gentoo.org/wiki/Postfix)), but `mailx` appears not to, sticking us with `sendmail`.
+To send email, you need two things:
+- A local mail daemon (we use `postfix`).
+- A mail command (we use `mailx`)
 
 To send an acceptable (not pretty - acceptable) mail run:
-`echo "Subject: [subject]" | sendmail -F "Takahe" -f "takahe@pukeko.xyz" -t matanhorovitz@protonmail.com <<< $([message-body])`
-> Example: Tacocat!
-`echo "Subject: tacocat" | sendmail -F "Takahe" -f "takahe@pukeko.xyz" -t matanhorovitz@protonmail.com <<< $(echo tacocat)`
+`echo "[message body]" | mail -s "[subject]" -f "[from address]" [to address]`
+Example: Tacocat!
+
+`echo "tacocat" | mail --subject="Takahe's got something important to say" matanhorovitz@protonmail.com`
 {.is-info}
-
-So long as it works, right?
-
-## Nextcloud mail
-Nextcloud requires STARTTLS on port 25 - see this example:
-![nextcloud_mail.png](/nextcloud_mail.png)