Email threads and subject lines

Learn more about how email threads work and how to update subject lines for your sequences.

If you use our sequences, you might have seen the option to reply to last thread or start a new thread. These are options that give you the ability to group your emails together or break them out. They are also referred to as "conversations" in some email programs.

Grouping email messages in the same thread

To keep the email messages grouped into the same email thread, toggle the Reply option on so it's highlighted in blue. You will notice that the subject line for the follow-up step will grey out so it can't be edited since it's going to be in the same thread.

Changing subject lines in follow-up emails

If you would like to start a new email thread as a follow-up, toggle the New Thread option. This will allow you to edit the subject line in the follow-up step. 

Frequently Asked Questions

What is a thread?

To simply explain it, a thread groups several email messages together that are part of the same conversation. This is what a thread looks like in Gmail:

Why can't I change the subject and reply to in the same thread?

In the land of emails, you cannot change the subject line if you want them grouped up together. This is something that is out of our control.

What happens if I change the subject line after the first email has been sent?

If you change the subject line after the first email was already sent (with the original subject line), it will update for new contacts added to the sequence moving forward.

The second email in the sequence will keep the newly updated subject line for those new contacts as well.

What happens to previously sent emails containing the old subject line after it's been updated?

If the first email step was sent to a contact with the old subject line, the second email will send with that same subject line.

The second email will not update with the new subject line since it needs to have the same subject line to be in the same email thread.