>>True. But LAN cards and MAC address change too. I find that more and more of my clients start to restrict or outright ban use of client emailing to SMTP. And I don't see an easy solution. Thank you.
>
>How often MAC Address is changed?
>When you change Computer or LAN card.
>In these cases you client should do something, right?
>Buy a new LAN Card or new computer.
>So in addition to this He/She should add new MAC address to SMTP Security.
I agree with you that it is not a big deal. But this customer - a big corporation - wants to push the buck. That is, they don't want to worry about doing it even if it is only once a year. They would rather have Dmitry deal with it <g>.
"The creative process is nothing but a series of crises." Isaac Bashevis Singer
"My experience is that as soon as people are old enough to know better, they don't know anything at all." Oscar Wilde
"If a nation values anything more than freedom, it will lose its freedom; and the irony of it is that if it is comfort or money that it values more, it will lose that too." W.Somerset Maugham
