Display names and email signatures are a helpful way to provide identification and personalization to the emails you send.
A display name is the text shown in the From field of incoming emails. Your display name, if you choose to set one, should reflect how you want to be identified to your email recipients, in addition to your email address.
A signature is any text that you choose to have automatically appended to the bottom of your email drafts in the Composer. This could be your name, position, workplace, or other contact information. Even if you set a signature in your account settings, you can still modify or delete your signature within the Composer for each new email.
When you create your ProtonMail account and when you add new email addresses in Settings -> Addresses/Users, you are given the option to customize your display name and signature.
You can always change your display name and signature in Settings -> Account under “Identity”. If you have multiple addresses, you can select an address from the drop-down menu to customize each one.
You also have the ability to leave the display name and signature blank. If you do not enter a display name, your email address is automatically used as a display name in most email clients. For example, if your email address is email@example.com, your display name will be shown to the recipient of the email as username or firstname.lastname@example.org.
Below you can see what the email address email@example.com displays as in Gmail when there is no display name set (notice the far left displays “contact” as the display name):
And here’s how the message appears in Gmail when we set the display name to “ProtonMail” (notice the far left shows “ProtonMail” as the display name):