Read-only / archive mode for IMAP mailboxes?

[Rᴇɴᴇ́ Pꜰᴇɪꜰꜰᴇʀ]

Hello!

We are currently exploring email archiving solutions. Is there a way to use an
IMAP mailbox in read-only / archive mode? The requirement is that delibveries of
new emails should be possible (via SMTP/LMTP), but no messages should be deleted
via IMAP access.

Frankly I don't think this works, but maybe some of you have tried this already.

Regards,
René.

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