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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 Torgo on Monday June 29, 2015 @12:28PM (#9799096)
I was under the impression that you just had to have an IP with an A record that matched the reverse DNS, even if it's not for the A record that's your email domain?
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Re:Own-Mailbox, the first 100% confidential mailbox by jlgaddis on Monday June 29, 2015 @04:01PM (#9800548)
It depends on the MX you're delivering mail to. Some aren't restrictive at all, some will reject if there's an A/PTR mismatch, etc. I make use of FCrDNS on my mail systems.
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