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

    [ https://issues.apache.org/jira/browse/JAMES-4213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18092241#comment-18092241 ] 

Felix commented on JAMES-4213:
------------------------------

Sounds good. It's nothing we strictly need, I just noticed it when refactoring something else and found it strange.

> 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
>            Priority: Minor
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> 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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