Quote:
Originally Posted by Folio
Fastmail and Runbox offer the option to turn off spam filtering, but I don't know if (or how much) mail they reject before it hits the spam filters. If you really want to be certain that no messages are being silently discarded, I suspect you would need to run your own mail server.
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Rejecting is not the same as silently discarding.
I don't know about Runbox, but FastMail's filtering that cannot be turned off by the user (that is: it is happening before the recipient id known) is rejection. That means no email is lost: the sender knows the email wasn't sent. Further spam filtering in FastMail is based on email filtering rules, so you can completely disable spam filtering and you can replace them by your own filtering rules.