Most outgoing email servers require that you use SMTP User Authentication when configuring your email client. This information tells them that you are authorized to use their outgoing SMTP mail server to send email and that it is okay for them to relay your messages.
Authentication is usually configured in the form of an email address or user ID and a password associated with that ID. When you don’t have SMTP Authentication configured in your email client, you are likely to get errors such as:
To add or modify the SMTP User Authentication in GroupMail, click on Tools/Account Manager (or Manage Accounts) and click “Modify” for the sender identity you wish to change. Then, click on the “Delivery Options” tab and check the “Requires Authentication” box under your SMTP server address. Click “Setup” to make the changes.
Then, check the “Use SMTP Authentication (outbound)” box and enter your user name and password for that mail server. Most SMTP mail servers will use the default AUTH Login, but there are other authentication types available, such as NTLM Authentication which is often used for Exchange Servers.
Then, click OK and return to the Delivery Options screen of Account Properties.
While you are here, it’s a good idea to also change the SMTP Domain so that it corresponds with the domain of the email address you are sending from. By default, GroupMail uses the default name for the computer that GroupMail is installed on.
To change this, click on the “Advanced” tab at the bottom of the Delivery Options screen and check “Use Custom Name” under the SMTP Domain section of the Advanced screen. Here, add the domain of the email address you are sending from. In this example, we are sending from a @verizon.net address, so we will just put “verizon.net” here.
Finally, click OK again at the bottom of the Delivery Options screen to save your changes settings and exit Account Properties.
Consider yourself authenticated!
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