Bug #80751 [NEW]: Comma in recipient name breaks email delivery

From: camaro396 at yandex dot ru Operating system: Windows Server 2012 R2 PHP version: 7.4.15 Package: Mail related Bug Type: Bug Bug description:Comma in recipient name breaks email delivery Description: ------------ Comma in recipient name leads to a malformed SMTP FROM command. Test script: --------------- mail('"Lastname, firstname" <lastname_firstname@example.com>', 'TEST', 'TEST', 'From: "Test" <test@example.com>'); Expected result: ---------------- Message sent successfully Actual result: -------------- Message not sent. SMTP transcript looks like this "SMTPD" 55224 293364 "2021-02-04 05:34:12.678" "xx.xx.xx.xx" "SENT: 220 mx.example.com" "SMTPD" 56232 293364 "2021-02-04 05:34:12.678" "xx.xx.xx.xx" "RECEIVED: HELO HOSTNAME" "SMTPD" 56232 293364 "2021-02-04 05:34:12.678" "xx.xx.xx.xx" "SENT: 250 Hello." "SMTPD" 55224 293364 "2021-02-04 05:34:12.678" "xx.xx.xx.xx" "RECEIVED: MAIL FROM:<sender@example.com>" "SMTPD" 55224 293364 "2021-02-04 05:34:12.678" "xx.xx.xx.xx" "SENT: 250 OK" "SMTPD" 55224 293364 "2021-02-04 05:34:12.678" "xx.xx.xx.xx" "RECEIVED: RCPT TO:<"Lastname>" "SMTPD" 55224 293364 "2021-02-04 05:34:12.678" "xx.xx.xx.xx" "SENT: 550 A valid address is required." "SMTPD" 55224 293364 "2021-02-04 05:34:12.678" "xx.xx.xx.xx" "RECEIVED: QUIT" "SMTPD" 55224 293364 "2021-02-04 05:34:12.678" "xx.xx.xx.xx" "SENT: 221 goodbye" -- Edit bug report at https://bugs.php.net/bug.php?id=80751&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=80751&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=80751&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=80751&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=80751&r=needscript Try newer version: https://bugs.php.net/fix.php?id=80751&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=80751&r=support Expected behavior: https://bugs.php.net/fix.php?id=80751&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=80751&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=80751&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=80751&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=80751&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=80751&r=dst IIS Stability: https://bugs.php.net/fix.php?id=80751&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=80751&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=80751&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=80751&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=80751&r=mysqlcfg