telnet to smtp on linux Share on Facebook Post on reddit Tweet on Twitter Share on LinkedIn Home › Forums › Other › Misc › telnet to smtp on linux This topic has 13 replies, 4 voices, and was last updated 9 years ago by Anonymous. Viewing 1 post (of 1 total) Author Posts aviltMember Jul 12, 2011 at 12:41 am #155440 I have a sendmail daemon running on Linux, I can telnet @ port 25 from local shell, however if I telnet from a remote system @ port 25, it doesn’t work. There is no firewall in between. Kindly advice. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.