The process is a little complicated, but it should be achieved successfully. Follow the instructions to properly set an auto-reply.
- Open Thunderbird and create a new message. This will be your auto-reply.
- Go to File > Save As and choose Template.
- Save the template name as Auto-Reply.
- Close the template, not go to Tools > Message Filters. Click New and change the name to Auto-Reply.
- Select Match all of the following, and under the For Apply Filter When change the Subject to To and insert your email address you want to activate the auto-reply for.
- Click the Plus button at the end of TO and change the TO to Status. Leave the middle menu at is, then select New.
- Click the Plus button again and change TO to Status and middle one to isn't, then the last field to Replied.
- Click Plus button one more time and change TO to Status then middle one to isn't and the latest one to Forwarded.
- Under Perform These Actions, select Move Message to and use Reply With Template from the drop down menu, then select Auto-Reply template.
- Close the filtering and enable the option in the Message Filters list.
- Now you have an Auto-Reply function inside Thunderbird.