Guyz Come To My Rescue

hey, guyz please i need your assistance before i loss my job.i work with a small firm and part of  my job require me sending mails in bulk, well all has been going on well for me untill when an IT student came to are office for his IT.He taught my boss how to use AMS which help us alot in sending our mails, and that gave us more time for other just jobs.well my problem started when he left after his IT.Which makes us back to square one because  he has been providing us with SMTP, which we use in sending the mails.i tried calling him,he told me to go get  the software that will  providing the SMTP for me.All am asking you guyz is to help me with the sotfware that can provide the SMTP, with username and password, i tried google but no result that why am begging you guyz to help me.my wedding is coming up in nov 28, abeg make i no loss my job before or after the wedding, my boss don dey threating me hoooooo!!!. i just wanna know  where i can download the software or if anybody can help with it.