Location of the MTA for your DbMail is configured as localhost . Is that correct?
DbMail Administrator (DBMA)
NOTE: A 'mail to' username alone is fine if your MTA will pass it to DbMail. Otherwise please enter a domain name.
Mail to:
Mail from:
Subject:
Message: Send
You can edit this message in any manner you wish.
Caution: Check that you are not sending an unusable encrypted password in this message.
Do you have an alternate 'mail-to' address for this user? Important if you have changed a password.