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Rejected email for unrecognized senders is not sending an email
An Unrecognized Sender sent an email to the Incoming Mail Account but the Web Help Desk does not send a Rejected Email to that user
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Overview
Product section
Cause
This Issue occurs when the domain matching is enabled from the E-Mail settings
(Setup > E-Mail > Options > 'Create Accounts for Unrecognized Senders' set to 'Only if e-mail matches an Accepted Domain') and the Outgoing Mail Account also has a list of Accepted Domains (Setup > E-Mail > Outgoing Mail Accounts > [Outgoing Mail Account] > 'Accepted Domains' )
WHD's attempt to send a rejection email to the user will fail if the unrecognized senders domain is not included in the outgoing mail account's 'Accepted Domains' list.
Resolution
Please make sure that the Accepted Domains field from the Outgoing Mail Accounts is blank to permit WHD to send email to all domains including the Unrecognized Senders'
1. Login to the WHD Console.
2. Go to Setup > E-Mail > Outgoing Mail Accounts > [Outgoing Mail Accounts] > remove all the domains listed in 'Accepted Domains', it should be blank.
OR
Add the rejected domain to the 'Accepted Domains'
3. Click Save