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The argument for blocking outbound SMTP is not primarily about misconfigured servers. It's about malware that wants to send spam.
by ef4 11y ago
The argument for blocking outbound SMTP is not primarily about misconfigured servers. It's about malware that wants to send spam.
- bhauer 11y agoGood point! Nevertheless, in my experience, ISPs will unblock port 25 for customers on request. I've only worked with a few in my years, but I've not yet encountered any resistance.
- tracker1 11y agoMost ISPs that I'm familiar with won't unblock common server ports (25, 80, 443) unless you are on a business account (though that's not much more these days). Though it isn't always just inbound 25 traffic... often it's outbound as well. Also, the larger issue is hacked/pwned machines and bots, not just open relays. Which reminds me, I need to update Tomato on my router.
- Elhana 11y agoMy ISP only blocks common ports on dynamic ip ranges. If you order a static IP, you do whatever you want with it. They even set reverse dns record for me when I asked, because some blocklists/mail servers want it that way. Issue with running your own mail server nowadays is spam. Gmail does a decent job filtering all the crap.