mailpit sendmail -t was not working because of the single dash argument
parsing. This commit fixes it.
Co-authored-by: Ronaldo Richieri <ronaldo@bestpractical.com>
In order to capture Bcc recipients from some platfoms (eg: Laravel) when the SMTP recipients contain Bcc recipients but are not listed in the message headers, the missing addresses are now added into the message Bcc header. If the Bcc header does not exist then it is created.
Resolves#35
