nbsmtp cannot connect to Gmail SMTP (Evolution can, mystery)
I'm trying to set up nbsmtp (tool similar to nullmailer or ssmtp, sendmail compatible, SMTP relay). So far I've used just Evolution, but now I want to try mutt. I compiled nbsmtp with SSL support. I have problems when connecting to Gmail SMTP server over SSL. From school network I tried this:
and it sent my email.
/usr/local/bin/nbsmtp -V -h smtp.gmail.com -f firstname.lastname@example.org -U email@example.com -P 'fish' -p 587 -s -S < mail/postponed
However It doesn't work when I'm on college network. Maybe this port is filered on firewall. I tried:
(Correct me if i used incorrect options please)
$ sudo nmap -p587 smtp.gmail.com
PORT STATE SERVICE
587/tcp closed submission
So I tried to change port number to 465. But when I run it, it just prints
and then waits too long (after 10 minutes I ^C-ed it).
Creating SSL connection to host (smtp.gmail.com:465)
So I tried to send mail from Evolution where I have configured Gmail SMTP server over SSL (to which I can connect) and then compared results from netstat:
I have set 'smtp.gmail.com' as SMTP server in Evolution and I also tried to use both IPs with nbsmtp, but neither works.
$ netstat -tpn
tcp 0 0 x.x.x.x:37758 18.104.22.168:465 ESTABLISHED18340/nbsmtp
tcp 0 27 x.x.x.x:56751 22.214.171.124:465 ESTABLISHED18166/evolution
However it is same with port 465 when I'm in school network.