SPF/qual
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SPF qualifiers
|
| character | description | |
|---|---|---|
+ |
plus | PASS -- This can be omitted; e.g., +mx is the same as mx. |
? |
question mark | NEUTRAL -- interpreted like NONE (no policy) |
~ |
tilde | SOFTFAIL -- a debugging aid between NEUTRAL and FAIL. Typically, messages that return a SOFTFAIL are accepted but tagged. |
- |
minus | FAIL -- the mail should be rejected |