On Mon, 14 Sep 2020, Philipp Ewald wrote:
Does anyone else checks the HELO/ELHO?
On 14 Sep 2020, at 17:22, John Hardin wrote:
I don't check for FCrDNS explicitly, but I do reject non-FQDN HELO
strings (e.g. no dots present) from the Internet. That catches a
surprising percentage of garbage up front.
On 14.09.20 17:43, Niels Kobschätzki wrote:
I greylist (what I usually do not do) when a HELO-string does not
resolve with a PTR-record.
PTR? the helo string should be an A or AAAA.
Do you check PTR of those addresses?
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
I feel like I'm diagonally parked in a parallel universe.
