Martin Brennan 48eb8d5f5a
Revert "DEV: Delete dead Topic#incoming_email_addresses code (#19970)" (#20037)
This reverts commit 88a972c61b0dec3ffe48bb7a37daeac74fa16ec6.

It's actually used in some plugins.
2023-01-27 11:27:15 +10:00
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