Blocking of SAP order confirmations by FortiMail

[FisherManFriend]

Hi everyone,

we are using FortiMail 7.6.2. 
Now we observe the following problem:
If an e-mail contains an SAP order confirmation with interactive fields, FortiMail will not accept the e-mail
In our mailflow, there is a mail server of a service provider before the FortiMail, which accepts the e-mails and then forwards them to the FortiMail.
If the service provider tries to forward such an e-mail to FortiMail, it receives the following meaningless error message:
"delivery temporarily suspended: lost connection with “IP FortiMail” while sending end of data."
In the mail event on the FortiMail you can only see that an attempt is made to forward the e-mail to the FortiMail every hour.
Now we have also found the cause. The e-mails are only blocked if “PDF” is activated in the content profile under Content Disarm and Reconstruction.
Has anyone had experience of this or found a solution?
We don't really want to completely deactivate this check to avoid blockages. Maintaining each affected sender manually is not the point either

Thank you in advance!

[Anthony_E]

Hello,

Thank you for using the Community Forum. I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.

Thanks,

[Anthony_E]

Hello,

We are still looking for someone to help you.

We will come back to you ASAP.

Regards,

[Anthony_E]

The error message "delivery temporarily suspended: lost connection with 'IP FortiMail' while sending end of data" indicates a temporary failure in the email delivery process.

This can occur due to several reasons, including network issues or timeouts.

To troubleshoot and resolve the issue:

1. Check Network Connectivity: Ensure there is stable network connectivity between the sending server and the FortiMail unit.
2. Review FortiMail Logs: Check the FortiMail logs for any error messages or warnings that might provide more context on the issue. 
3. Verify DNS Configuration: Ensure that DNS settings are correctly configured and that the FortiMail unit can resolve domain names properly.
4. Check for Timeouts: As mentioned in the context, slow or unresponsive DNS server responses can cause timeouts. Verify the responsiveness of DNSBL and SURBL servers.
5. Retry Delivery: In most cases, the sending MTA (Mail Transfer Agent) will automatically retry delivery. Monitor to see if the issue resolves itself after a retry.