[Support] devzwf - Postfix-Relay

[ZappyZap]

Application Name: Postfix-Relay
Application:  https://github.com/loganmarchione/docker-postfixrelay

Description :

This runs Postfix (as a relay) in Docker.

• Most home ISPs block port 25, so outbound emails must be relayed through an external SMTP server (e.g., Gmail).
• This container acts as a single collections point for devices needing to send email.
• ⚠️ Postfix acts as an open relay. As such, this is not meant to be run on the internet, only on a trusted internal network!
• You must already have a account on an external SMTP server (e.g., Gmail, AWS SES, etc...).
• Your external SMTP server must be using encryption (i.e., plaintext is not allowed)

 

Make sure to look at the complete documentation

 

Please post any questions/issues relating to this docker template you have in this thread.

[ksarnelli]

Thanks for packaging this up - I currently  have my postfix relay running on a raspberry pi but now I'm setting up this container as a backup.  One small ask - can you make the 'mynetworks' setting (in /etc/postfix/main.cnf) configurable as an environment variable?  Right now it defaults to 0.0.0.0/0 but I'd like to lock it down to particular hosts.

[ZappyZap]

I am using https://github.com/loganmarchione/docker-postfixrelay
i could probably do that , but it would require me to build the conatiner myself.
I always priviledge the official container when it exist

 

you could ask on the project see if he is willing to do so.

[ksarnelli]

19 hours ago, ZappyZap said:

I am using https://github.com/loganmarchione/docker-postfixrelay
i could probably do that , but it would require me to build the conatiner myself.
I always priviledge the official container when it exist

 

you could ask on the project see if he is willing to do so.

 

Thanks, will do.

 

[ZappyZap]

@ksarnelli Nice i saw you raise an issue and the developer said he will take it...
https://github.com/loganmarchione/docker-postfixrelay/issues/8

as soon as he modify it i will update the template.
remind me if i forgot.
thanks

[ZappyZap]

@ksarnelli template updated to match the new Env variable added in v 1.3.0

Let me know

[ksarnelli]

32 minutes ago, ZappyZap said:

@ksarnelli template updated to match the new Env variable added in v 1.3.0

Let me know

Thanks @ZappyZap - everything checks out!

[flinte]

Can this be utilized with Office365 instead of Gmail?  I find that its quite finicky and a lot of my other self hosted applications SMTP notification settings cant use it.  I would love to have a local postfix relay that I could point those applications to.

[ZappyZap]

1 hour ago, flinte said:

Can this be utilized with Office365 instead of Gmail?  I find that its quite finicky and a lot of my other self hosted applications SMTP notification settings cant use it.  I would love to have a local postfix relay that I could point those applications to.

i dont really get you quetsion.
you can use that with what ever you want as you configure your relay.

and what is quite finicky ?

[ThrashMan]

Good evening,

 

this is a gr8 little container.

I've had to hack the postfix configs as I'm relaying through my email address' SMTP server and so emails have to come from my address.

I used this: (taken from: https://serverfault.com/questions/147921/forcing-the-from-address-when-postfix-relays-over-smtp)

 

This is how to really do it in postfix.

This config changes sender addresses from both local originated, and relayed SMTP mail traffic:
/etc/postfix/main.cf:
sender_canonical_classes = envelope_sender, header_sender sender_canonical_maps = regexp:/etc/postfix/sender_canonical_maps smtp_header_checks = regexp:/etc/postfix/header_check


Rewrite envelope address from email originating from the server itself
/etc/postfix/sender_canonical_maps:
/.+/ [email protected]

Rewrite from address in SMTP relayed e-mail
/etc/postfix/header_check:
/From:.*/ REPLACE From: [email protected]

 

Would it be possible to build this into the template, please?
The current MYORIGIN is expecting a domain......if the user enters an email address then apply the above?

thanks,

Andy.

[ZappyZap]

Great info there, but i am not the maintainer of the docker image ,
i just implement the unraid template using https://github.com/loganmarchione/docker-postfixrelay
i am not changng anything in the conf file

 

[lmm7425]

Hello there 👋 I'm the container author and just updated it to fix the issue above. Version `1.4.1` contains a new variable called `FROMADDRESS` that you can set to fix the issue. I was unable to replicate it (I don't use Unraid and I'm using AWS SES, which doesn't seem to need that variable), but a user on GitHub tested and confirmed that it fixed their issue.

[ZappyZap]

5 hours ago, lmm7425 said:

Hello there 👋 I'm the container author and just updated it to fix the issue above. Version `1.4.1` contains a new variable called `FROMADDRESS` that you can set to fix the issue. I was unable to replicate it (I don't use Unraid and I'm using AWS SES, which doesn't seem to need that variable), but a user on GitHub tested and confirmed that it fixed their issue.

Thanks
the container should get updated next round

i will give it a test

[James Miller]

Hi,

 

I'm not sure if it's something I've done, but the docker container is always showing as 'unhealthy'?

[ZappyZap]

weird 
i am running this one personnaly for many month with no issue, it is getting updated often tho (some would say too much )
but is it working still ?