Take the tour ×  I set up a Postfix server on my Ubuntu VPS and
it works for sending email from the mail utility in the command
line. I set up SPF records, DKIM, pretty much everything I could
read about. However, I'd like to be able to send and receive
email without SSHing into my box each time.  When I try to set
up my server (borogov.es) with my mail client, and I use
"mail.borogov.es" as my outgoing mail server, I get "Server not
responding." I feel like this is an access issue of some sort,
but I'm not sure.  I'm not running a firewall. What could be
going on?  share|improve this question add comment  2 Answers
See what netstat -tlnp returns; if Postfix is listening to, then
it's bound to loopback interface instead of a network card
interface.  In that case your Postfix /etc/postfix/main.cf does
not have inet_interfaces = all line.  The other option is that
your ISP does not allow private SMTP servers.  share|improve
this answer It is listening on all, and DigitalOcean does allow
SMTP servers. –  tekkno