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authorMicah <micah@leap.se>2016-07-12 11:20:58 -0400
committerMicah <micah@leap.se>2016-07-19 10:44:11 -0400
commitbbdc193f05cb2f1624d6c7bbffd27f8060de35c8 (patch)
tree5afe409027ccc69fd7d3c1895e39bb1800c9d2d0 /doc/upgrading
parent68544ba2ffdfa988c060b3b4c5bd075f7304a022 (diff)
Block ip-based helo at MTA (#8139).
Numeric helo is a very strong indicator of spam. When this is blocked, a very significant amount of spam stops. Change-Id: Ieb340190faf37638950d1aa60b52268659e0b7f6
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