SpamAssassin rule
TO_NO_BRKTS_HTML_ONLY
To without angle brackets in an HTML-only message
+1.999 points
Combination of other tests (meta rule)
What TO_NO_BRKTS_HTML_ONLY means
The To header is a bare address without angle brackets, and the message is HTML only. Typical of spam software.
The rule's description in SpamAssassin: “To: lacks brackets and HTML only”
How to fix it
Write To as "Name <address>" and add a plain-text part.
Does your email trigger TO_NO_BRKTS_HTML_ONLY?
Send it to a free test address: we run SpamAssassin, check SPF, DKIM and DMARC and show every rule with a fix.
Open the email spam checkerRelated rules
FROM_EXCESS_BASE64From header needlessly encoded
INVALID_DATEInvalid Date header
MAILING_LIST_MULTILooks like mailing-list software
MISSING_DATENo Date header
MISSING_FROMNo From header
MISSING_HEADERSNo To header
MISSING_MIDNo Message-ID header
MISSING_SUBJECTNo subject
MSGID_FROM_MTA_HEADERMessage-ID added by a relay
Frequently asked questions
What does TO_NO_BRKTS_HTML_ONLY mean?
The To header is a bare address without angle brackets, and the message is HTML only. Typical of spam software.
How do I fix TO_NO_BRKTS_HTML_ONLY?
Write To as "Name" and add a plain-text part.
How many points does TO_NO_BRKTS_HTML_ONLY add?
1.999 points in the default SpamAssassin ruleset (network tests on, Bayes off). A message is treated as spam from 5.0 points. Mail servers can change scores locally.