What is the subject line checker?
The subject line checker lets you preview your subject line across a range of email clients and devices instantly. You can also see how your email will appear in the notification box.
The subject line checker can be found within the 'Subject line' tab within your email preview test. The subject line checker will use the subject line and email address you had used when you had submitted your test to Litmus.
You may change or update the subject line or from contact at the top of the page. This will then generate new screenshots for the inbox and notification popups for the subject line email clients. NOTE: This will not update the subject line or from addresses within the Previews tab.
You will have the option to view both the inbox view and the notification view for your subject line and from addresses.
We also have a free version of the subject line checker available, which does not require a Litmus account to use. This can be found here.