sending email through php flagged as spam

[TestUser]

Hey all
i dont know why here are the xspam headers from email..
anyone any idea what is the issue?

SPFCheck: Server passes SPF test, -30 Spam score
X-Spam-Score: 4.8 (++++)
X-Spam-Report: Action: add header
Symbol: ARC_NA(0.00)
Symbol: RCVD_TLS_LAST(0.00)
Symbol: SUBJ_EXCESS_BASE64(1.50)
Symbol: R_SPF_ALLOW(-0.20)
Symbol: MULTIPLE_UNIQUE_HEADERS(1.40)
Symbol: R_BAD_CTE_7BIT(1.05)
Symbol: TO_DN_NONE(0.00)
Symbol: HAS_X_POS(0.00)
Symbol: RCPT_COUNT_ONE(0.00)
Symbol: AUTOGEN_PHP_SPAMMY(1.00)
Symbol: TO_MATCH_ENVRCPT_ALL(0.00)
Symbol: DMARC_POLICY_ALLOW(-0.50)
Symbol: FROM_NO_DN(0.00)
Symbol: MIME_HTML_ONLY(0.20)
Symbol: SUBJECT_ENDS_EXCLAIM(0.00)
Symbol: FORGED_SENDER(0.30)
Symbol: R_DKIM_NA(0.00)
Symbol: MIME_TRACE(0.00)
Symbol: ASN(0.00)
Symbol: FROM_NEQ_ENVFROM(0.00)
Symbol: RCVD_COUNT_TWO(0.00)
Message-ID: [email protected]
X-Old-Subject:account is created!
Subject: *****SPAM***** account is created!
X-Spam-Status: Yes, score=4.8, +20 total spam score
X-Spam-Bar: ++++
SpamTally: Final spam score: 27
X-Antivirus-Scanner: Clean mail though you should still use an Antivirus

 

[MisterM]

Hello
What do you use for antispam?