mirror of
https://github.com/LCTT/TranslateProject.git
synced 2024-12-26 21:30:55 +08:00
86 lines
3.4 KiB
Markdown
86 lines
3.4 KiB
Markdown
|
[#]: subject: "relaying mail to multiple smarthosts with opensmtpd"
|
||
|
|
[#]: via: "https://jao.io/blog/2021-11-09-relaying-mail-to-multiple-smarthosts.html"
|
||
|
|
[#]: author: "jao https://jao.io"
|
||
|
|
[#]: collector: "lujun9972"
|
||
|
|
[#]: translator: " "
|
||
|
|
[#]: reviewer: " "
|
||
|
|
[#]: publisher: " "
|
||
|
|
[#]: url: " "
|
||
|
|
|
||
|
|
relaying mail to multiple smarthosts with opensmtpd
|
||
|
|
======
|
||
|
|
|
||
|
|
I like to use a local smtp daemon for sending email from my laptop, because that way i can send emails even while disconnected and, even when the network is up, because i don't have to wait for the network protocol to be completed with a remote smarthost. Oh, and i also need local mail delivery.
|
||
|
|
|
||
|
|
For many years i've used postfix to those ends; it has an acceptably simply-ish configuration; but recently i've become fond of VPNs ([mullvad][1], if you want to know), and was annoyed by its getting confused when `/etc/resolv.conf` changes (for instance, because you get the VPN up after postfix's service has started). I've found a pleasantly simple alternative: [OpenSMTPD][2].
|
||
|
|
|
||
|
|
Say i want to use the SMTP server fencepost.gnu.org when sending an email as [jao@gnu.org][3] and smtp.jao.io when writing with [mail@jao.io][4] or [news@xmobar.org][5] in my `From` header. OpenSMTPD let's you do that with a very simple configuration file in `/etc/smtpd.conf`[1][6]:
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
table aliases file:/etc/aliases
|
||
|
|
table secrets db:/etc/mail/secrets.db
|
||
|
|
|
||
|
|
table sendergnu { jao@gnu.org }
|
||
|
|
table senderjao { mail@jao.io, news@xmobar.org }
|
||
|
|
|
||
|
|
listen on localhost
|
||
|
|
|
||
|
|
action "local" mbox alias <aliases>
|
||
|
|
action "relaygnu" relay host smtp+tls://gnu@fencepost.gnu.org:587 auth <secrets>
|
||
|
|
action "relayjao" relay host smtps://jao@smtp.jao.io:465 auth <secrets>
|
||
|
|
|
||
|
|
match for local action "local"
|
||
|
|
match for any from mail-from <sendergnu> action "relaygnu"
|
||
|
|
match for any from mail-from <senderjao> action "relaygan"
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
where we have also configured local delivery for a good measure. That's the full configuration file! The only other thing needed is generating the `secrets.db` file with the users and passwords corresponding to the keys `gnu` and `jao` (those are just arbitrary names). To that end, we create a plain text file with them, using entries of the form `<key> <user>:<password>`:
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
gnu jao:my fencepost password
|
||
|
|
jao mail@jao.io:xxxxxxxxxxxxxxxxx
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
where my user for `fencepost.gnu.org` is `jao` and for `smtp.jao.io` is `mail@jao.io` (you see there's no need of escaping spaces or ats). Then we use the program `makemap` to create the secrets db:
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
makemap secrets && rm secrets
|
||
|
|
|
||
|
|
```
|
||
|
|
|
||
|
|
### Footnotes:
|
||
|
|
|
||
|
|
[1][7]
|
||
|
|
|
||
|
|
That's the default configuration file in my debian box; other popular alternative is `/etc/openstmpd.conf`.
|
||
|
|
|
||
|
|
[Tags][8]: [sundry][9]
|
||
|
|
|
||
|
|
--------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
via: https://jao.io/blog/2021-11-09-relaying-mail-to-multiple-smarthosts.html
|
||
|
|
|
||
|
|
作者：[jao][a]
|
||
|
|
选题：[lujun9972][b]
|
||
|
|
译者：[译者ID](https://github.com/译者ID)
|
||
|
|
校对：[校对者ID](https://github.com/校对者ID)
|
||
|
|
|
||
|
|
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||
|
|
|
||
|
|
[a]: https://jao.io
|
||
|
|
[b]: https://github.com/lujun9972
|
||
|
|
[1]: https://en.wikipedia.org/wiki/Mullvad
|
||
|
|
[2]: https://www.opensmtpd.org/
|
||
|
|
[3]: mailto:jao@gnu.org
|
||
|
|
[4]: mailto:mail@jao.io
|
||
|
|
[5]: mailto:news@xmobar.org
|
||
|
|
[6]: tmp.zHAc8OxDnm#fn.1
|
||
|
|
[7]: tmp.zHAc8OxDnm#fnr.1
|
||
|
|
[8]: https://jao.io/blog/tags.html
|
||
|
|
[9]: https://jao.io/blog/tag-sundry.html
|