Có thể bạn chưa biết, phần mềm Email đầu tiên được Ray Samuel Tomlinson, sinh ngày 23/4/1941 mất ngày 5/3/2016, một lập trình viên máy tính tiên phong người Mỹ, phát triển chạy trên mạng ARPNET, tiền thân của Internet ngày nay, vào năm 1971. Đó là hệ thống đầu tiên cho phép gửi thưContinue reading “Email tròn 50 tuổi <3"
Category Archives: Sendmail
Sendmail backup mx relay
I have used sendmail for a number of years. We use it on our main mail server and on our backup mx servers. Up until recently we simply allowed the backup mx servers to relay all mail to the domains they serve. Unfortunately spammers tend to target backup mx servers in the belief they areContinue reading “Sendmail backup mx relay”
Sendmail’s Greet_Pause
Slamming is a popular spammer tactic in which the spammer quickly fires off SMTP messages without waiting for responses from the receiving server. A poorly behaved MTA will then accept traffic from the spammer, instead of rejecting it as it should. But even well-behaved MTAs are affected because of the sheer volume of traffic withContinue reading “Sendmail’s Greet_Pause”
Removing mails spam-scored over 10
I am using SpamAssassin 3.1.x on Linux. Now, all mails with spam score over five (5) are marked as spams (so simple configuration). Further more, I would like to remove permanently all mails with score over ten (10). Here is content of /etc/procmailrc to do that: DROPPRIVS=yes MAX_SCORE=10.00 MIN_SCORE=5.00 :0fw | /usr/bin/spamc :0 * ^X-Spam-Status:.*score=\/[0-9\.]+Continue reading “Removing mails spam-scored over 10”