TYPO3 Core

Upgraded to php 5.3.1
Current version typo3 4.2.10
Still the same problem.
Also Checked typo3 current 4.2.11 changelog and made a diff of mail classes, no diferences found.

Checked mails with rfc tool messagelint (http://www.apps.ietf.org/content/message-lint).

This is the protocol, showing the problems:
BEGIN -------------------------------------------------------------------------------------
WARNING: use SMTP MAIL FROM/return-path instead of non-standard errors-to in
header 'Errors-To' at line 2
ERROR: unexpected tokens at end of header 'From' at line 3
ERROR: Token type special: <
ERROR: Token type atom: test
ERROR: Token type special: @
ERROR: Token type atom: xxxxx
ERROR: Token type special: .
ERROR: Token type atom: com
ERROR: Token type special: >
UNKNOWN: unknown header 'X-Mailer' at line 4
UNKNOWN: unknown header 'X-Priority' at line 5
ERROR: At least one of To, CC, or BCC required lines 1-8 (RFC 822 sec 4.1)
ERROR: missing mandatory header 'date' lines 1-8
ERROR: missing mandatory header 'return-path' lines 1-8
OK: found part multipart/alternative line 10
OK: preamble 10:
OK: preamble 11:
OK: preamble 12: This is a multi-part message in MIME format.
OK: preamble 13:
OK: found part text/plain line 18
WARNING: decoded line 23 too long (211 chars); text/plain shouldn't need
folding (RFC 2046-4.1.1)
OK: found part text/html line 73
WARNING: decoded line 79 too long (231 chars); text/plain shouldn't need
folding (RFC 2046-4.1.1)
WARNING: decoded line 82 too long (91 chars); text/plain shouldn't need
folding (RFC 2046-4.1.1)
WARNING: decoded line 86 too long (104 chars); text/plain shouldn't need
folding (RFC 2046-4.1.1)
END -------------------------------------------------------------------------------------

Regarding the error with the recipient in the header, there once was a bug in the tracker for typo 4.04, issue #0004692 . We patched the t3lib_htmlmail like described and the error in the validator disappeared. But still mesages are not display correctly, something seems to go wrong with the encoding.

This is the debug info from the install tool, domain paths taken away:

1. DEBUG SYSTEM INFORMATION - START ###
   HTTP_HOST : xxxxxxxxxxxx
   TYPO3_HOST_ONLY : xxxxxxxxxxxxxx
   TYPO3_PORT :
   PATH_INFO :
   QUERY_STRING : TYPO3_INSTALL[type]=phpinfo
   REQUEST_URI : /typo3/install/index.php?TYPO3_INSTALL[type]=phpinfo
   HTTP_REFERER : xxxxxxxxxxxxxxxxxx
   TYPO3_REQUEST_HOST : xxxxxxxxxxxxxxxxxxx
   TYPO3_REQUEST_URL : xxxxxxxxxxxxxxxxxxxxxxx
   TYPO3_REQUEST_SCRIPT: xxxxxxxxxxxxxxxxxxxxxxx
   TYPO3_REQUEST_DIR : xxxxxxxxxxxxxxxxxxxxxxxxxxxx
   TYPO3_SITE_URL : xxxxxxxxxxxxxxxxxxxxxxxxxxx
   TYPO3_SITE_SCRIPT : typo3/install/index.php?TYPO3_INSTALL[type]=phpinfo
   TYPO3_SSL :
   TYPO3_REV_PROXY :
   SCRIPT_NAME : /typo3/install/index.php
   TYPO3_DOCUMENT_ROOT : /var/www/vhosts/xxxxxxxxxxxxxx/httpdocs
   SCRIPT_FILENAME : /var/www/vhosts/xxxxxxxxxxxx/httpdocs/typo3/install/index.php
   REMOTE_ADDR : XXX.XXX.XXX.XXX
   REMOTE_HOST :
   HTTP_USER_AGENT : Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/532.0 (KHTML, like Gecko) Chrome/3.0.195.38 Safari/532.0
   HTTP_ACCEPT_LANGUAGE: de-DE,de;q=0.8,en-US;q=0.6,en;q=0.4
   CONST: PHP_OS : Linux
   CONST: TYPO3_OS :
   CONST: PATH_thisScri: /var/www/vhosts/xxxxxxx/httpdocs/typo3/install/index.php
   CONST: php_sapi_name: apache2handler
   OTHER: TYPO3_VERSION: 4.2.10
   OTHER: PHP_VERSION : 5.3.1-0.dotdeb.1
   imagecreatefromgif(): 1
   imagecreatefrompng(): 1
   imagecreatefromjpeg(: 1
   imagegif() : 1
   imagepng() : 1
   imagejpeg() : 1
   imagettftext() : 1
   OTHER: IMAGE_TYPES : 31
   OTHER: memory_limit : 128M
   SERVER: SERVER_PORT : 80
   SERVER: SERVER_SOFTW: Apache/2.2.9 (Debian) mod_jk/1.2.26 PHP/5.3.1-0.dotdeb.1 with Suhosin-Patch mod_python/3.3.1 Python/2.5.2 mod_ssl/2.2.9 OpenSSL/0.9.8g mod_perl/2.0.4 Perl/v5.10.0
   SERVER: GATEWAY_INTE: CGI/1.1
   SERVER: SCRIPT_NAME : /typo3/install/index.php
   SERVER: PATH_TRANSLA:
   T3CV_GFX: image_proc: 1
   T3CV_GFX: gdlib : 1
   T3CV_GFX: gdlib_png : 0
   T3CV_GFX: gdlib_2 : 0
   T3CV_GFX: im : 1
   T3CV_GFX: im_path : /usr/X11R6/bin/
   T3CV_GFX: im_path_lz: /usr/bin/
   T3CV_GFX: im_version: gm
   T3CV_GFX: im_negate_: 0
   T3CV_GFX: im_imvMask: 0
   T3CV_GFX: im_combine: combine
2. DEBUG SYSTEM INFORMATION - END ###

PROBLEM IS SOLVED
The errors occured due to the php directive mail.add_x_header. This was accidentally globally set to on in a new server environment. The directive is buggy, as it automatically adds a directive to the mailheaders with the wrong linebreak so that the header crashes. On Unix systems this should be turned off.

Closed as requested, no change required.

Thank you for keeping us updated, Boos!