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https://issues.apache.org/jira/browse/JAMES-3851?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Karsten Otto closed JAMES-3851.
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Resolution: Fixed
> TLS host name verification should handle trailing dot
> -----------------------------------------------------
>
> Key: JAMES-3851
> URL: https://issues.apache.org/jira/browse/JAMES-3851
> Project: James Server
> Issue Type: Bug
> Components: Remote Delivery
> Affects Versions: master
> Reporter: Karsten Otto
> Priority: Major
> Time Spent: 50m
> Remaining Estimate: 0h
>
> I noticed that sometimes RemoteDelivery opens a connection using a fully
> qualified hostname that ends with a trailing dot, like "mail.example.org." I
> believe James may get that from MX resolving, since afaik DNS servers may do
> this to indicate an absolute FQDN vs. a relative one. This is not an issue
> when establishing a connection, but will break TLS hostname verification,
> since the CN and SubjectAltNames in server certificates never use trailing
> dots.
> Consequently, RemoteDelivery should strip a trailing dot from the hostname
> before connecting.
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