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1

This isn't an answer and should probably be posted as a comment instead. Regardless, I mostly agree. Fingerprinting SMTP servers is not very difficult, so this won't stop a determined attacker. However, hiding as much non-vital information as possible is generally regarded as good security practice, so the question is interesting from more than an academic point of view.

tarleb
– tarleb

2016-01-27 06:55:52 +00:00
Commented Jan 27, 2016 at 6:55
@tarleb, that it is "generally regarded as good practice" doesn't make it right. Typical attackers either aim at anything that moves, or scout ahead. None of those will be hampered in the least by childish "let's play hide and seek" games.

vonbrand
– vonbrand

2016-01-27 10:21:14 +00:00
Commented Jan 27, 2016 at 10:21
1

@tarleb "hiding as much non-vital information as possible is generally regarded as good security practice" thats it. Also... seems like some services change their spam rating when detecting email coming from postfix servers.

TCB13
– TCB13

2016-02-01 15:42:00 +00:00
Commented Feb 1, 2016 at 15:42
@TCB13 Interesting, I didn't know that. Thanks :)

tarleb
– tarleb

2016-02-02 09:33:40 +00:00
Commented Feb 2, 2016 at 9:33

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