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A comment on Own-Mailbox, the first 100% confidential mailbox. Parent comment

Re:Own-Mailbox, the first 100% confidential mailbox by tracker1 on Monday June 29, 2015 @01:04PM (#9799338)
Most 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.

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Re:Own-Mailbox, the first 100% confidential mailbox by Elhana on Monday June 29, 2015 @01:43PM (#9799619)
My 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.

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