So, if you want to relay mail out of your MX, it's going to be flaky from a DSL or cable line. The reason is because much of the email coming out of those IP ranges is virus-sent spam, many mail servers block those IP ranges. (ISPs are doing a pretty good job filtering port 25 these days. The only really annoying spam I get is from Sprint's mobile network. I would block those IP ranges, but I want to be able to relay mail from my Sprint mobile phone :)
I run a mail server on my Linode and have never had trouble sending mail. It's easy to see if you're on a blacklist and take corrective action, though I've never had to do this.
I recently switched from Postfix to Exim4 and like it a lot more. The spam checking is much better integrated and lets you reject messages at DATA time with full spam information, so real messages that are auto-rejected at least bounce with an informative message.
Finally, if you don't like delayed mail, get a backup MX. It's very easy to set up for your friends that run their own primary MX, and you can return the favor. (I buy a backup MX service, but run backup MX for people that have asked.)
I run a mail server on my Linode and have never had trouble sending mail. It's easy to see if you're on a blacklist and take corrective action, though I've never had to do this.
I recently switched from Postfix to Exim4 and like it a lot more. The spam checking is much better integrated and lets you reject messages at DATA time with full spam information, so real messages that are auto-rejected at least bounce with an informative message.
Finally, if you don't like delayed mail, get a backup MX. It's very easy to set up for your friends that run their own primary MX, and you can return the favor. (I buy a backup MX service, but run backup MX for people that have asked.)