What port is used for Simple Mail Transfer Protocol (SMTP)? Warning: Trying to access array offset on false in /home3/indiakep/public_html/wp-content/plugins/dw-question-answer/inc/Template.php on line 8 All Questions › Category: Networks › What port is used for Simple Mail Transfer Protocol (SMTP)? 0 Vote Up Vote Down Chetan Shidling Staff asked 5 years ago Options: 142 420 199 80 25