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I'm using smtpmail to send email (via mu4e) in Emacs at my work. When I connect via wireless, I can send mail without problem, but when I connect to the wired connection it doesn't work, producing an error:
network-stream-open-starttls: smtp.gmail.com/587 System error
Given that I can access the internet via the wired connection, I'm not sure why the wired connection wouldn't work for sending mail.
1Same network, or different networks? Some folks/ISPs/businesses block outgoing email ports for security reasons. – Brian Adkins – 2013-09-04T21:31:25.113
They're both my work's networks. – emacsomancer – 2013-09-05T17:50:54.300