Hostname in $phpmailer

Hi,
would it be possible to add the hostname field to the plugin and send the value to $phpmailer->Hostname? I have a web server in another hosting and mail serwer in another hosting and I get the error “550 Bad HELO – Host impersonating domain name”. Unfortunately, the mail hosting will not change the configuration so I have to add $phpmailer->Hostname in the plugin code. I tested it and it will work. Unfortunately, there are no filters/actions that would allow me to add this parameter without manually modifying the plugin code.