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Why can I block superspam for POP and IMAP emails like I can for SMTP?

April 26, 2017block emails IMAP pop SMTP

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Why can I block superspam for POP and IMAP emails like I can for SMTP?

1 Answer

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For the same reason that you can’t quarantine POP/IMAP spam. The message is not scanned until it is requested by the mail client. At that point, the message (even if it is spam) must be delivered to the client to complete the transaction.