<![CDATA[Postal: 📨 A fully featured open source mail delivery platform for incoming & outgoing e-mail]]>Screenshot

Postal is a complete and fully featured mail server for use by websites & web servers. Think Sendgrid, Mailgun or Postmark but open source and ready for you to run on your own servers. Postal was developed by aTech Media to serve its own mail processing requirements and we have since decided that it should be released as an open source project for the community.

https://github.com/atech/postal

]]>https://forum.cloudron.io/topic/1127/postal-a-fully-featured-open-source-mail-delivery-platform-for-incoming-outgoing-e-mailRSS for NodeThu, 08 Oct 2026 06:17:41 GMTThu, 08 Mar 2018 19:53:01 GMT60<![CDATA[Reply to Postal: 📨 A fully featured open source mail delivery platform for incoming & outgoing e-mail on Thu, 12 Mar 2026 08:59:17 GMT]]>I have looked into it.
When packaging postal we could bind port 25 to 127.0.0.1 and not map it in the CloudronManifest.json.
But we lose many of features the people want to use postal for.

For outbound-only the postal API or internal docker IP to access the internal postal SMTP could be used and this sound more like a service compared to a singular app.

Another big issue - https://github.com/postalserver/postal/issues/48#issuecomment-310317594

What about authentication on SMTP relays?
That isn't supported. You should configure your relay to allow connections from the IP of your Postal server.

The amount of features lost and lack of auth for SMTP relays is a mayor roadblock.

So I came to conclusion that we will not package postal for Cloudron.

]]>https://forum.cloudron.io/post/121704https://forum.cloudron.io/post/121704Thu, 12 Mar 2026 08:59:17 GMT<![CDATA[Reply to Postal: 📨 A fully featured open source mail delivery platform for incoming & outgoing e-mail on Tue, 13 Dec 2022 20:44:48 GMT]]>Part of the problem with self-hosted email sending deliverability is the lack of that data on bounces, marked as spam and unsubscribe rates, so Postal might help with that, and levelling the field against the tech-giant dominance over this one specific area that they know is one of their leverage tools to diminish the internet for those that don't fall into line.

]]>https://forum.cloudron.io/post/58190https://forum.cloudron.io/post/58190Tue, 13 Dec 2022 20:44:48 GMT<![CDATA[Reply to Postal: 📨 A fully featured open source mail delivery platform for incoming & outgoing e-mail on Tue, 13 Dec 2022 15:21:49 GMT]]>@marcusquinn I absolutely second all that is said here above.
Postal would a 'feature' that would greatly enhance the CR offer.

]]>https://forum.cloudron.io/post/58172https://forum.cloudron.io/post/58172Tue, 13 Dec 2022 15:21:49 GMT<![CDATA[Reply to Postal: 📨 A fully featured open source mail delivery platform for incoming & outgoing e-mail on Tue, 13 Dec 2022 09:57:46 GMT]]>@girish Most of those services use shared IP addresses, and upsell dedicated IPs on the basis that their shared IPs might not be as reliable for delivery reputation.

In my experience, none of the relays can help deliverability from their reputation alone, it's the tools (like Postal) they offer that help you make sure you're not sending marketing emails to people that unsubscribe, mark the emails as spam, or bouncing.

Deliverability is more to do with domain and email address reputation, content and minimal unsubscribes or abuse reports.

Any new domain email address to be used for mass-mailing should really be warmed up, there's a whole industry of platforms offering that service, due to the need, and explaining it better themselves:

I realise building a good reputation for email delivery is hard, but that's because bad people ruin things for the rest of us, but Postal is a good anti-lockin tool for businesses sending emails, because otherwise they get locked in to their reputation being somewhat tied to the 3rd-party SaaS relay.

Plus, it's another thing that Cloudron pro users could resell to their clients, save money from 3rd-party relays, and use your own separate Cloudrons for mail relay.

After all that, I think it's still a worthy candidate app for many online Pros 🙂

]]>https://forum.cloudron.io/post/58132https://forum.cloudron.io/post/58132Tue, 13 Dec 2022 09:57:46 GMT<![CDATA[Reply to Postal: 📨 A fully featured open source mail delivery platform for incoming & outgoing e-mail on Mon, 12 Dec 2022 13:50:39 GMT]]>Additional and descriptive statistics accessible by domain is a swell add to the platform of cloudron

]]>https://forum.cloudron.io/post/58101https://forum.cloudron.io/post/58101Mon, 12 Dec 2022 13:50:39 GMT<![CDATA[Reply to Postal: 📨 A fully featured open source mail delivery platform for incoming & outgoing e-mail on Mon, 12 Dec 2022 12:43:15 GMT]]>@marcusquinn Services like Elasticmail provide deliverability. Postal won't solve that since it will send either via the VPS IP or via some relay (like Elasticmail). Unfortunately, no way out of those costs.

]]>https://forum.cloudron.io/post/58090https://forum.cloudron.io/post/58090Mon, 12 Dec 2022 12:43:15 GMT<![CDATA[Reply to Postal: 📨 A fully featured open source mail delivery platform for incoming & outgoing e-mail on Mon, 12 Dec 2022 12:16:39 GMT]]>Currently using ElasticMail, but all these costs add up, this would definitely get some use if we get to packaging it.

]]>https://forum.cloudron.io/post/58086https://forum.cloudron.io/post/58086Mon, 12 Dec 2022 12:16:39 GMT<![CDATA[Reply to Postal: 📨 A fully featured open source mail delivery platform for incoming & outgoing e-mail on Mon, 12 Dec 2022 20:33:25 GMT]]>@girish said in Postal: 📨 A fully featured open source mail delivery platform for incoming & outgoing e-mail:

Does it include a SMTP server

Think it might, see https://docs.postalserver.io/welcome/feature-list where it says:

Send messages to the SMTP server or using the HTTP API.

]]>https://forum.cloudron.io/post/58083https://forum.cloudron.io/post/58083Mon, 12 Dec 2022 20:33:25 GMT<![CDATA[Reply to Postal: 📨 A fully featured open source mail delivery platform for incoming & outgoing e-mail on Mon, 12 Dec 2022 12:10:38 GMT]]>Oooh, I just realised Postal is now run by Krystal who I'm aware of because they are on my list of Eco VPS providers. I now like them even more knowing that they also maintain cool things like Postal!

]]>https://forum.cloudron.io/post/58081https://forum.cloudron.io/post/58081Mon, 12 Dec 2022 12:10:38 GMT<![CDATA[Reply to Postal: 📨 A fully featured open source mail delivery platform for incoming & outgoing e-mail on Mon, 12 Dec 2022 11:59:02 GMT]]>Yeah, I think postal is a relay server. Does it include a SMTP server or does it integrate with an existing one?

]]>https://forum.cloudron.io/post/58076https://forum.cloudron.io/post/58076Mon, 12 Dec 2022 11:59:02 GMT<![CDATA[Reply to Postal: 📨 A fully featured open source mail delivery platform for incoming & outgoing e-mail on Sun, 11 Dec 2022 21:08:10 GMT]]>I wish some of the cool postal features were on the Cloudron platform itself. Like mail logs per domain, accessible via customer users per domain. More statistics per domain, bounces, delivery rate. But then Cloudron is a very different product for other use cases 🙂

That's why I installed postal on a bare Ubuntu.

]]>https://forum.cloudron.io/post/58058https://forum.cloudron.io/post/58058Sun, 11 Dec 2022 21:08:10 GMT