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How to filter outbound emails?
Hello,
We have our dedicated SMTP selfhosted, which host few users and domains.
We want a self-hosted solution or a way to filter all outbound emails that are Spam, Phishing or any bad emails and block them. can anyone help or suggest us?
We use KumoMTA as relay agent. We want something in middle to scan emails before sending it to our MTA.
Flow Like
Sender -> Email Filtering Tool -> KumoMTA -> Recipient
Comments
@NameCrane , not sure relation with http://spamexperts.com/services/outgoing-filter but it's an option for there email customers.
Mail.baby .
As an easier implementation, you can always set up a relay server in between the sender and KumoMTA that filters out spams if you don't want them to go directly to the next hop.
For more difficult implementation, it should be possible to intercept the outgoing mail at the sender side, through some customized Milter filters or MTA hooks that integrates with the specific MTA software that you use.
There’s also
https://spamwall.com/
as well. Iirc @jar used them a while back
You could use Proxmox Mail Gateway for filtering outbound email.
https://pmg.proxmox.com/pmg-docs/pmg-admin-guide.html#_filtering_outgoing_emails