Domain Published Policy regarding SPAM Detection

[JK-Effects]

Hello,
I am currently trying to receive emails from an invoicing programme. However, these are always recognised as spam and therefore do not end up in my inbox.
In addition, I am unfortunately unable to access the JunkMail folder from Thunderbird.

In Stalwart, under ‘Queues > Reports’, I have found an entry for the domain from which I want to receive the invoice.
I saw the following info there.

I have also tried adding the domain and the sender domain (amazonses.com) to the Trusted List. However, this did not work.

Can anyone help me so that I can generally activate domains system-wide or that I can access the junk mail folder?

[mdecimus]

I am currently trying to receive emails from an invoicing programme. However, these are always recognised as spam and therefore do not end up in my inbox.

It this software running inside your network? If it is then configure it to use the SMTP submissions port instead (you'll need to create an username and password for your software), this way you can avoid the SPAM filter.

In addition, I am unfortunately unable to access the JunkMail folder from Thunderbird.

You probably need to subscribe to the Junk Mail folder. In Thunderbird folders are not displayed until you subscribe to them.

[JK-Effects]

This software does not run inside my network.

Is there an easy way to find and subscribe to the junk mail folder?

[mdecimus]

This software does not run inside my network.

In that case create a new account and then configure your invoicing software to authenticate using this account when sending emails.

Is there an easy way to find and subscribe to the junk mail folder?

Thunderbird has a subscribe option available from the menu.

[JK-Effects]

I think you misunderstood me.
The invoicing software is not in my network or does not use my e-mail address. I only receive a copy when the invoice is sent. The programme uses its own email address and is marked as spam when it is sent.

I'll have to try it out with Thunderbird.

[mdecimus]

Is the invoice system using a domain with valid DMARC records? If so, try adding your invoice system's domain name to the "DMARC domains" list.

[alex9434]

You might try to whitelist the domain to improve the spam score. The approach is described here:
https://stalw.art/docs/spamfilter/settings/domain_lists

[JK-Effects]

I tried that, but the mail was still marked as spam.
Maybe the time between setting the allow list and receiving the mail was too short.

I'll try it later and let you know if it works or not.

[alex9434]

Then you probably need to write a sieve script that either deletes the spam classification or moves the message back into inbox.
I did not find an option in Stalwart to "whitelist" senders like gmail or others can do. That might be a good feature request. Or I did mis-read the documentation?

[JK-Effects]

Adding the email to the whitelist made no difference.

After researching these domains, I think I now know why they are being detected as spam.