Gmail – Automatic re-labelling emails

This is the best way I have found to make an automatic forwarded and replied to messages indicator / marker in Gmail - based on a filter (conversation view must be enabled):

1. Go to Settings -> Labels and create two new labels: Replied and Forwarded. You can also shorten their names to RPL and FWD. It doesn't matter what you label them, just as long as it has meaning to you.

   You can also colorize the labels as you want - e.g Green for Replied and Blue for Forwarded.

2. Go to Settings -> Filters and create a new filter with only one condition - From: me. Make sure you apply the label to your inbox.

   • You can also create two more filters for messages containing the words Re: and Fwd: in the subject, but some messages arrive with the word Re: in the subject, and some people delete the word Re: from the subject when they reply to a message.

However, this does not solve the problem entirely; for example, if I reply to a certain message, and the recipient replies back, then the conversation is still labeled as Replied. That's the reason conversations that include (someone, me) only indicate I have replied at least one time in the conversation.

If the conversation view is disabled - I won't have the problem mentioned above - but I won't be able to automatically mark / tag / label messages I have replied to, because my reply is not part of a conversation, and therefore I can't apply any generic filter to messages I have replied to.

This answer assumes that all of the automated emails are sent from the same address.

I'm not sure how you've created your filter, but try filtering by the from: field only. If the automated sender's address is always something like no-reply@domain.com then set up your filter to filter on:

from: no-reply@domain.com

This will make sure all automated email will hit the filter. Then, when someone else replies to that address, the new sender's email will be different from the one listed in the filter, and allow it to hit the inbox as normal.