<![CDATA[Using alternative MX]]>Hi all,

we're using N-able Mail Assure for Spam Filtering, so naturally the MX records are set to:

mx1-eu.mtaroutes.com (priority 10)
mx2-eu.mtaroutes.com (priority 20)
mx3-eu.mtaroutes.com (priority 30)
mx4-eu.mtaroutes.com (priority 40)

Now, obviously Cloudron doesn't like this and throws out an error on the status page.

As i don't like error notifications even though everything works as expected, i looked for a solution and stumbled upon this in the documentation:

https://docs.cloudron.io/email/#alternate-mx

So, i have added mtaroutes.com to the SPF record, but honestly i do not understand how the SPF record should change anything in this situation.

Can someone explain like i'm 5 how this would actually work?
And i guess, i'll still not be able to get rid of the MX error on the status page right, at least i do not see a connection here?

Thanks in advance everyone!

]]>https://forum.cloudron.io/topic/5606/using-alternative-mxRSS for NodeSun, 16 Aug 2026 08:00:31 GMTWed, 01 Sep 2021 15:02:16 GMT60<![CDATA[Reply to Using alternative MX on Mon, 03 Nov 2025 13:57:57 GMT]]>@ExocortX what if you add an additional SPF for your domain?

@girish there should be a way for Cloudron to have clean notifications when configs are correct.

For many it’s psychological and triggering their ADHD or OCD.

]]>https://forum.cloudron.io/post/114776https://forum.cloudron.io/post/114776Mon, 03 Nov 2025 13:57:57 GMT<![CDATA[Reply to Using alternative MX on Mon, 03 Nov 2025 12:33:51 GMT]]>You can simply ignore the MX check . This is just a reminder for the admin that MX is not pointing to Cloudron mail server. In general, this is not the common set up that the UI is optimized for.

]]>https://forum.cloudron.io/post/114768https://forum.cloudron.io/post/114768Mon, 03 Nov 2025 12:33:51 GMT<![CDATA[Reply to Using alternative MX on Sat, 25 Oct 2025 13:23:13 GMT]]>Hello, in my case, the emails are going through google first. I have one email in google workspace for delivrability, my internal emails in cloudron.
my MX record:
MX mydomain.com smtp.google.com

my spf record:
v=spf1 include:_spf.google.com a:mail.mydomain.com ~all

technically it works but I still get an error in the DNS Status:
MX record
Hostname: @
Record type: MX
Expected value: 10 mail.mydomain.com
Current value: 1 smtp.google.com

what should i put in the SPF to make it work without error ?

thanks in advance !

]]>https://forum.cloudron.io/post/114429https://forum.cloudron.io/post/114429Sat, 25 Oct 2025 13:23:13 GMT<![CDATA[Reply to Using alternative MX on Fri, 03 Sep 2021 06:36:25 GMT]]>@murgero thank you!

]]>https://forum.cloudron.io/post/36026https://forum.cloudron.io/post/36026Fri, 03 Sep 2021 06:36:25 GMT<![CDATA[Reply to Using alternative MX on Thu, 02 Sep 2021 23:42:54 GMT]]>@teamcrw With the mx record and spf matching cloudron will see that and probably either suppress or remove the errors.

To quote:

Cloudron has a anti-spoof feature to ensure that only it can generate emails for the incoming domains. This feature will prevent the external MX from forwarding emails to it. However, Cloudron skips this spoof check for servers listed in the domain's SPF record. So, white list the MX's IP address block in the domain's SPF record. Note that it is necessary to specifically whitelist the server(s).

This means Cloudron uses the SPF record to confirm emails sent from a domain cloudron controls uses the right server(s). Add the N-able MX servers to SPF and call it day I'd say

]]>https://forum.cloudron.io/post/36022https://forum.cloudron.io/post/36022Thu, 02 Sep 2021 23:42:54 GMT