Return
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Title
SMTP configuration error when using a non-deliverable email address -
Description
The SMTP configuration will not allow me to proceed without SMTP authentication. Entering just the "smtp server", "port", and "from address" fields results in an error similar to the following if the email address used does not have a valid mailbox and cannot receive email:
"Could not connect to the SMTP server <ServerName> on port <PortNumber>. The server rejected the given recipient. The server responded: 550 5.1.1 <EmailAddress> ... User unknown"
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Cause
By Design. -
Resolution
There was a change made in GPOADmin 5.11 and later in regards to how the SMTP settings are validated. In GPOADmin 5.10 and earlier, we simply checked that the entered email address in the "From" field of the SMPT settings was in the correct email format and that we could contact the SMTP server. This was made more robust in GPOADmin 5.11 and later where we now test to see not only if we can send an email through the SMTP server, but that the email can be sent to the "From" address from the "From" address. This is to verify that the email is in the correct format and exists to prevent email errors.By using an address that does not have a mailbox, the GUI is returing "User Unknown" due to the fact that the SMTP server is returning a message that the "To" email address does not exist. This would be considered a correct error in this situation.By using an address without a mailbox, the workaround in this case is to edit the registry manually to force validation of the non-existing email address. Note: We recommend that customers use a valid email address in the "From" field in SMTP even when using anonymous SMTP:- Open Regedit
- Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Quest\GPOADmin\ServerConfig\Mail
- Change "Enabled"="False" to "Enabled"="True"
- Test some actions which should send notifications without attempting to edit the SMTP settings again. Do not attempt to open the SMTP configuration, just try to produce a notification.