Today, I found myself trying to filter a message in Gmail based on the "Reply-to:" header. "Reply-to:" was the only user-friendly header that clearly distinguished it from other types of messages I receive. I knew that Gmail allows list-based filtering using a "list:" prefix in the "Has the words:" field. But, I haven't found a resource to tell you what, if any, other prefixes are allowed. I tried "reply-to:" without success. Then, I searched and found another poor soul with the same dilema. A bit more futzing and I discovered that "replyto:" was the correct prefix. Unfortunately, the Google help forum won't let me post a reply (!) So, I am hoping that romadatnvwisp will read this post and learn how easy it is to filter based on the "Reply-to:" header. Maybe he's figured it out himself?
To recap... lets say you want to filter messages with a Reply-to: address of "firstname.lastname@example.org". Here's how you do it:
- Click the gear icon in the upper-right-hand-corner of Gmail, then select "Mail settings"
- Click the "filters" tab, scroll to the bottom and click "Create a new filter"
- Type "replyto:email@example.com" in the "Has the words" field
- Click "Next Step" and finish creating the filter; note that matching messages should appear below after clicking "Next Step"