ZF2-185: LF/CR statically given in \Zend\Mail\Headers.php::toString()
In \Zend\Mail\Headers and its toString() function are two occurrences of "\r\n".
This breaks mails by adding a blank line between header lines. In my case removing the CR helped (i was using a CentOS VM and SmtpTransport).
Would you please check if it is useful to switch LF vs CR+LF based on the OS in use? I would prefer the use of __toString() instead of toString(), too.
Thx for having a look at it. Jade