[jira] [Created] (JAMES-4213) ValidRcptHandler does not properly check aliases

Felix created JAMES-4213:
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             Summary: ValidRcptHandler does not properly check aliases
                 Key: JAMES-4213
                 URL: https://issues.apache.org/jira/browse/JAMES-4213
             Project: James Server
          Issue Type: Bug
          Components: SMTPServer
            Reporter: Felix


Currently, it is only checked if the recipient is a user or if there is a mapping with the recipient as source. It is not checked that this mapping actually points to a local mailbox.
We do not want to accept emails that go directly to an error repository, so this should be caught after the SMTP RCPT command.

I would be in favor to enforce that all targets it resolves to are valid but that may break some poorly maintained groups, I guess.
The alternative is to to accept a recipient if it resolves to at least one mailbox that is present. 



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