nette
defaultMailer func, LF used in headers instead of recommended CRLF
Version: 2.10.8 (and many before)
Bug Description
Php manual says that input to mail function "must obey" RFC2822 https://www.php.net/manual/en/function.mail.php http://www.faqs.org/rfcs/rfc2822.html
There is stated in this RFC that: 2.2. Header Fields Header fields are lines composed of a field name, followed by a colon (":"), followed by a field body, and terminated by CRLF.
Tracy in its defaultMailer replaces everything to just LF. https://github.com/nette/tracy/blob/59062116fd36efd9579061af1dcbc0472cea1d63/src/Tracy/Logger/Logger.php#L172-L174
Currently, it has caused some trouble on PHP 8.1.24 - emails are not received as the mail server detects multiple 'from' addresses in one mail header because it can't properly split headers by '\n'. I admit I have not really tested what specifically causes the bug - whether it's some configuration, this particular PHP version, or something else (we tested that PHP 8.2 and 8.3 do not cause this issue). However, I have verified that CRLF works correctly. Since it is described as a 'must obey' rule, I am reporting this as a bug. I can also PR it if we have no reason to persist with LF endings. Opinions?
Steps To Reproduce
Not needed imo and hard to do so, based on server config / php version.
Expected Behavior
obey the rfc
Possible Solution
alter line endings during replacements in defaultMailer function
