# Application settings… - Email
The Boomerang system uses emails to send different types of messages, like warnings, alarms or reports to system users.
The ‘Email’ form is used to define SMTP email server account settings that is used for this purpose.
## Setup/Change email settings
The “**Reply address**” is a sender’s address in the email sent by Boomerang. As there is no recipient on Boomerang side it shall be set to any non-existing but valid email address like e.g. .
The “**Subject**” is placed in a subject field in the email sent by Boomerang.
The “**Message header**” is the first row text of the email sent by Boomerang.
The “**SMTP server**” and “**Port number**” must be set accordingly to SMTP mail server settings.
The “**Use authentication**” is used if the SMTP email server requires authentication, tic the checkbox and enter the Username and Password.
Before saving the settings, test them as described in 9.4.2.
Click “Apply” and sign to store the settings/changes
## Test email settings
To test the settings enter your email address into box right from the “Test” button
Click “Test”
If all the settings are correct, the dialog ‘Message was sent ok’ appears as shown below.
Click OK to close the dialog.
Click ‘Apply’ and sign.
Check if the test message was received.
If settings are incorrect, an error message is displayed. An example of such a message is shown below but note that the text will differ depending on which setting is incorrect.
Basing on the error description, correct the settings and try to send the test email again until the operation is successful.
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