Prevent Disclaimer from being appended to Halp Auto-Replies

[Dan Rico]

We recently started testing a appended disclaimer for all inbound emails from external addresses.

There is an email alias that is used for creating tickets and a forwarding rule exists to forward the emails to the inbound Halp email address.

When Halp auto-replies to the user from that internal address, the disclaimer is appended because Halp's SendGrid email is responding on behalf of the internal address (and is authorized to do so).

What is the correct method for excluding this sender from getting the disclaimer appended to the emails without increasing up the risk for possible spoofing? Are there any identifying values in the Halp email headers that can be used to do this? 

The current flow is:

1. User emails "support@foo.com"
2. Halp auto-replies from "support@foo.com"
3. Email gets disclaimer appended because "support@foo.com" is the alias that Halp's SendGrid is using.

Side note: DKIM and DMARC are being utilized as well to ensure that Halp is authorized to send on behalf of the "support@foo.com" account - if that helps give any more defining characteristics.

[Fletcher Richman]

Hi Dan! 

Halp does not have custom email headers, but you should be able to look at the DKIM Signature Headers and filter based on this value:

inbound.halp-mail.com

Let us know if that doesn't work!