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Thread: Connecting to SMTP remote host under AWS EC2


hey kids,

i'm running ubuntu server 12.04 lts on several servers on amazon cloud ec2 service. have installed , configured postfix/dovecot secure smtp server on 1 of servers. can send emails server. relaying bulk email service.

problem want communicate server 1 of other servers in same security group. have searched solution , found lot of advice, nothing complete , comprehensive.

things i've tried:
telnet ip 25 remote host - hangs , never responds
i've added following
mynetworks = 0.0.0.0/0 [::/0]
/etc/postfix/main.cf, , restarted postfix no change

i've used netstat verifiy postfix listening on port 25
sudo netstat -plntu; sudo ls -l /proc/11830 | grep exe

tcp 0 0 0.0.0.0:25 0.0.0.0:* listen 11830/master

lrwxrwxrwx 1 root root 0 aug 21 23:00 exe -> /usr/lib/postfix/master

can telnet in local host.

can me out here. conflict under ec2, ssh, postifix, or ubuntu?

help.

i'm not @ sure if relevant problem since i'm new using aws ec2 , s3 .. yesterday bookmarked reference "elastic ip's" apparently allow inter-instance communications. i've yet try out.

http://alestic.com/2009/06/ec2-elastic-ip-internal


Forum The Ubuntu Forum Community Ubuntu Official Flavours Support Installation & Upgrades [ubuntu] Connecting to SMTP remote host under AWS EC2


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