MailCleaner Support

First thing, if you check this feature and get a message from a domain that doesn't have a SPF, mails will NOT be rejected. Said otherwise you wont lose mails from domains which don't have SPF.

Now SPF can be checked in

Configuration-> SMTP

that way mails are rejected directly in SMTP stage (they don't go to quarantine) It does only apply to SPF fields ending with "-all"

SPF can also be checked in

Configuration->AntiSpam->SpamC

In that case, mails failing SPF with "-all" are going to quarantine, mails failing SPF with other severities get a score associated to each case.

For now, you are in fact protected for SPF issues, this is done in SpamC.