I’m trying to figure out how to make two separate emails show up in the same conversation thread in Gmail. I thought using the same subject line would do the trick, but it’s not working.
Both emails are sent directly to my Gmail address and have almost identical headers. The subject lines are the same and UTF-8 encoded. Despite this, the second email always starts a new thread.
Does anyone know what I’m missing? Is there a special trick to make Gmail group these emails together? Maybe something to do with the Message-Id?
I’ve dealt with this issue before, and it can be frustrating. One thing that worked for me was ensuring the ‘References’ header in the second email included the Message-ID of the first email. This seems to be a key factor in Gmail’s threading algorithm.
Another aspect to consider is the time gap between emails. If there’s a significant delay, Gmail might start a new thread regardless of other factors. I’ve found that sending follow-up emails within a reasonable timeframe (say, within a day or two) increases the chances of them being grouped together.
Lastly, if you’re generating these emails programmatically, you might want to look into the ‘thread-index’ header. While it’s not officially supported by Gmail, I’ve noticed it sometimes helps with threading, especially for emails generated by automated systems.
hey FlyingStar, Gmail can be tricky sometimes! have u tried adding ‘Re:’ to the subject line? that usually works for me. also, check if the emails are coming from the same sender address. if not, Gmail might see them as separate convos. hope this helps!
Gmail’s thread grouping can be finicky. In my experience, matching subject lines alone isn’t always enough. The ‘In-Reply-To’ and ‘References’ headers play a crucial role. Ensure these headers in the second email reference the Message-ID of the first. Also, timing matters. If there’s a significant delay between emails, Gmail might start a new thread regardless. Lastly, check your Gmail settings. There’s an option to disable conversation view, which could affect threading. If all else fails, you might need to tweak your email generation code to better align with Gmail’s threading algorithm.