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I was recently told that an email could not be traced as the IP address it was sent from expires 5 days after using it. I've never heard of that. What email server uses disappearing IP addresses? Is this true?

2006-12-20 06:28:06 · 10 answers · asked by kmchris 1 in Computers & Internet Security

10 answers

Yes, it's possible to have the IP address "disappear" in 5 days. The fact is, the IP address was handed out dynamically using DHCP. If the lease time for an IP address is only 5 days, then after that period of time, the machine will have to request for a new IP address as the one it currently has already expired. It may or may not get the previous IP address assigned to it.

Take note that the email was sent from the client which could have expiring IP addresses.

2006-12-20 06:32:00 · answer #1 · answered by Del S 2 · 0 0

Expiring? They probably don't "expire." They are simply stored to be used again later or maybe set up for a different use than email. I have yet to see a agency so wasteful as to trash an IP after five days.

2006-12-20 14:51:52 · answer #2 · answered by .PANiC 5 · 0 0

Most dynamic IP addresses have a lease of only 24 hours these days. And most IPs are dynamic these days also.

2006-12-20 14:32:13 · answer #3 · answered by Anonymous · 0 0

no, your email can stil lbe traced, even if you are on dynamic ips.

YOUR isp keeps records of all the times you log and log off . They can keep that for years.

So if you sent an email say 10 years ago, and someone decided to sue you and want to use taht email to locate you or use against you because they didnt' know your identity, they can subpoena the isp that it originated from and they can give whomever the information needed to track you down.

2006-12-20 14:31:53 · answer #4 · answered by arus.geo 7 · 0 0

What i think the person ment was... The #%@$ sending you spam will probably have had to change his ip address as the one he spamed you with will have been reported multiple times and is probably blocked by now.

2006-12-20 14:35:13 · answer #5 · answered by Anonymous · 0 0

Yes, I work in a government agency, and we have expiring ones because of the secure nature of our systems.

2006-12-20 14:31:50 · answer #6 · answered by deacondarlin 1 · 0 0

Yep, it just depends on your internet service provider and the lease times they use. If it's an issue, you can always call them and see what they will do for you.

2006-12-20 14:30:59 · answer #7 · answered by big mal 3 · 0 0

yah i have heard of it. that's known as dynamic IP address. which changes frequently...

2006-12-20 14:33:55 · answer #8 · answered by Sagar 6 · 0 0

Yes it called DHCP

2006-12-20 14:34:43 · answer #9 · answered by Mike 4 · 0 0

It Depends on your ISP

2006-12-20 14:29:42 · answer #10 · answered by Anonymous · 0 0

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