With threading, you can set up your sequence so that each email is sent as a reply to the previous email with the same subject line. This gives your contacts context and allows them to see all of their interactions with you in one place.
Emails that are replies to a previous email will appear as part of a continuous conversation in this contact's inbox instead of separate email threads. You can expect it to look like threading does in a normal email thread.
In HubSpot, emails that are replies will include a reply icon next to the subject line.
To edit threading for an existing email in a sequence:
In your HubSpot account, navigate to Automation > Sequences.
Select the name of the sequence you want to edit.
In the upper right, click Edit.
To change the threading option for an existing email, click the Actions dropdown and select Edit threading.
In the right panel, change your email type.
Please note: there's a file size limit of 20 MB for files attached to sales emails. When you thread sequences emails, any email attachments will be included in all of the replies in the thread, which could cause you to hit the file size limit.
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