Configure an SMTP connection in Serv-U

In Serv-U, it is possible to configure basic SMTP connection to send emails for events configured to use email actions.
The Serv-U does not host the SMTP itself but uses an existing and working SMTP basic authentication to allow the use of SMTP.
This SMTP can be configured on the Global Leve or Domain level, or both. The SMTP configuration at the domain level can be inherited from the server level. The SMTP configuration dialog is located in the Events tab in the Domain pages.

Click Configure SMTP to launch the dialog, and then specify the following details:

• SMTP Server: The name or IP address of the SMTP server.
• SMTP Server Port: The port the SMTP server is using.
• From Email Address: The email address to use for the outgoing email.
• From Name (optional): The name to use for the outgoing email.
• This server requires a secure connection (SSL): On some SMTP servers all incoming connections must be encrypted to protect against possible attacks. If your server requires that all incoming connections must be encrypted, enable this option. The default port for encrypted SMTP connections is 465.
• My server requires authentication: To enable authentication, select this option.

If your SMTP server requires authentication, enter the following information:

• Account Name: The account name associated with authentication for the SMTP server.
• Password: The password for the account.

Testing the SMTP configuration

Perform the following steps to test the SMTP configuration in Serv-U:

1. After specifying the details of the SMTP server and the corresponding account, click Send Test Email to test your SMTP connection.
2. In the Send Test Email window, specify the email address where you want to send the test email to, and then click Send. Optionally, you can edit the subject and content of the test message.
3. If the email was sent successfully, click OK on the confirmation window to save your SMTP configuration, or click No to return to the SMTP Configuration window.

If an error occurs at any stage of the configuration test, Serv-U returns one of the following error messages in the SMTP error window.

For more information, see Configure Serv-U events

Troubleshooting Tips:

1. Telnet {ip add of email server} 25, from windows command prompt. If using a different port, use it.
2. Use Powershell to test if the email is possible with Basic Authentication:

   • Send-MailMessage -To '<recipient’s email address>' -From '<sender’s email address>' -Subject 'Your message subject' -Body 'Some important plain text!' -Credential (Get-Credential) -SmtpServer '<smtp server>' -Port 25
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   • Input basic credentials from the window above.
   • A test email will be received if successful, and no error will appear on the PowerShell.
   • If there are errors, there is an SMTP issue on the SMTP server connection. Contact your SMTP admin or provider for support.