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SPF explanation
MailCleaner Support
Added about 3 years ago
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.