I have installed apache on localhost to test my python cgi scripts but would like send-only postfix functionality to see if users receive confirmation emails from webmaster@mydomain.com. A google search for this points to you, but the domains I own are on shared web hosting plans with other providers. Can I test smtp with droplets and if so, how?
You can create a droplet and install email service on that.. After which add MX entry to host the email server on your droplet IP.. I guess it cant be done if your host or domain registered has advance DNS control panel..
So
mail.yourdomain.com -> your VPS IP
smtp.youromdian.com -> your VPS IP
imap.youromdian.com -> your VPS IP
also MX entry to yourdomain.com points to your VPS IP
VPS should be running a proper email server..
I think this can be done in similar way as your can use Google apps or MS Hotmail for your domain programs !!
Unfortunately I'm using shared hosting, not VPS hosting, so when I run dig on mydomain.com, there is no MX server listed. I'm no more interested in testing my scripts in a shared hosting environment than any VPS owner would be, but I can't see a way around the problem, since I'm not running my own mail server. I was looking for a cloud service to avoid having to install Postfix on my localhost - Postfix/sendmail is a lot more work to set up and maintain than Apache2, since Apache can function in stand-alone mode.