emailing invoice from AR through Web Screens takes 5 min per email

choosing the customer method who is set to email to company contact does work but it takes exactly 5 min per invoice. Sending from the desktop client it is instant.  Any ideas what can be done ot make the a more management length of time.  It takes 5 min from the web screens regardless if if i run local to where the sage install is local or remote

I was unable to get it to work at all using the smtp.office365.com because I believe the problem is that they require the ‘StartTLS’ security option.

I setup an SMTP server on my cloud server and added it to the SPF record so it is allowed to send email directly.  Now it works but it is unmanageable slow.