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How to configure Thunderbird with Elastic Email
How to configure Thunderbird with Elastic Email

Learn more about how to send mail using Thunderbird.

Support Team avatar
Written by Support Team
Updated over a week ago

To send mail using Thunderbird you need to modify your outgoing server settings in Thunderbird accordingly.
Additionally, you can modify settings in Thunderbird that will allow you to include a SMTP API header in your emails if you wish to leverage categories or other features of the SMTP API when sending mail via the Thunderbird client.

Start by going to: ‘Menu’ -> ‘Options’->‘ Account Settings’

Enter the following Settings

1. Description - Elastic Email

2. Server Name -

3. Port - 465

4. Connection security - SSL/TLS

5. Authentication method - Normal password - when prompted for it during your sending, please provide the password of your chosen SMTP credential

6. User Name - your Elastic Email SMTP credential. You can generate one here.

Incorporating SMTP API headers requires the following

1. Select Tools > Options (Win) or Thunderbird > Preferences (Mac) from the menu in Thunderbird.

2. Open the “Advanced” category.

3. Go to the “General” tab. - Click “Config Editor”:

a) Enter “mail.compose.other.header” under “Filter:”

b) Double-click mail.compose.other.header.

c) Enter “X-SMTPAPI”

d) Click OK.

e) Close the configuration editor and preferences dialog.

Restart Thunderbird.

Create a mail message and just like you would add a CC or BCC to your email, click the drop-down option that will now allow you to add a header of the type “X-SMTPAPI” in addition to “To”.

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