How do I update my email signature in Email Engine?
THIS ARTICLE IS FOR: All ListKit customers
Stage: Onboarding / Setup
Owner: CS
Last updated: July 2026
TL;DR
Email signatures are set per inbox from the Inboxes tab inside Email Engine
You can update signatures one inbox at a time or in bulk across all inboxes at once
Keep it simple, name, title, company, and an unsubscribe line is all you need
The signature is added to the bottom of every email sent from that inbox
Maximum 350 characters and recommended for compliance
How to update your email signature
Single inbox
Go to Email Engine in the left sidebar and click Inboxes.
Find the inbox you want to update, click the three dot menu on the right side of the row, and select Update Email Signature.
The signature editor will open. Type your signature in the text field and click Save when done.
Multiple inboxes at once
If you want to apply the same signature across multiple inboxes, you can do it in bulk.
From the Inboxes tab, check the box next to each inbox you want to update — or check the box at the top of the list to select all inboxes at once.
Once your inboxes are selected, a bulk action bar will appear at the bottom of the screen. Click Update Signature, enter your signature, and save. The same signature will be applied to every selected inbox at once.
What to include in your signature
Keep it short and professional. A good cold email signature includes:
Your full name
Your job title and company name
Your email address and phone number
Your website
An unsubscribe line — for example: To stop receiving emails, reply with UNSUBSCRIBE
The unsubscribe line is recommended for compliance and gives prospects a clear way to opt out without marking your email as spam.
Frequently asked questions
Is the signature the same across all inboxes?
Not automatically. Signatures are set per inbox, which is why the bulk update option is useful if all your inboxes share the same sender identity. If you have multiple personas with different names and details, update each persona's inboxes separately.
Is there a character limit?
Yes, 350 characters maximum.
Does the signature appear on every email in a campaign?
Yes. The signature is added to the bottom of every email sent from that inbox, across all campaigns it is assigned to.