On Thu, 17 Jan 2002, Thad Horak wrote: > Hi all, > > A co-worker recently told me that about 10% of the > email servers today will block email sent to them if > they cannot ping the sending mail server in an effort > to combat spam. It makes sense, but I've always > thought that blocking ICMP at my firewall and only > allowing port 25 communication was best practice. Has > anyone else come across this? Thanks in advance. This wrong. Mail not sending if not reverse zone in DNS. This all depending configuration MTA.
WBR, Valentin Ermolaev, VE2-UANIC
