last few weeks have been trying to send to a particular domain mint.com.bn  but recipient say they did not receive the emails, it is not in the spam and they have checked their firewall.  Anyway to look at mail log to see if the mail has been 'delivered' or any issues?  So far this is the first we ever had problems.  I am  connected via IMAP / OL365 and smtp server is smtp.zoho.com using ssl/tls.  

tks

chin