Suddenly have started receiving the above error without any changes having been made to the script.
Host is 1and1 (I know...)
The script still works fine on a different server, and so my suspicion is that there must have been some server config change that has lead to this, although the hosts plead ignorance.
There's no information on the above error at all in Google that I can find - does anybody have any ideas? Server is running Apache if that helps.
Had just the similar problem.
It came out of the blue. No PHP Code was changed.
What was changed: PHP was upgraded 5.5.25-1 to 5.5.26.
A security risk in PHP
mail() function has been fixed and extra newlines in
additional_headers are allowed no more. Because extra newlines mean: now starts the email message (and we surely don't want somebody to inject some newlines through headers followed by an evil message).
What previously have worked fine, e.g. just having extra newlines after headers or even passing the whole message to
additional_headers, will function no more.
additional_headersargument. These count as "multiple or malformed newlines":
\r\r, \r\0, \r\n\r\n, \n\n, \n\0.
additional_headersfor headers only. Email message (multipart or not, with ir without attachments, etc) belongs in
messageargument, not in headers.
PHP Security Bug report: https://bugs.php.net/bug.php?id=68776
C Code diff how its fixed: http://git.php.net/?p=php-src.git;a=blobdiff;f=ext/standard/mail.c;h=448013a472a3466245e64b1cb37a9d1b0f7c007e;hp=1ebc8fecb7ef4c266a341cdc701f0686d6482242;hb=9d168b863e007c4e15ebe4d2eecabdf8b0582e30;hpb=eee8b6c33fc968ef8c496db8fb54e8c9d9d5a8f9