Yeah. Parsing mail headers won’t give him a reliable indicator of the source IP he’d need for that, and If you had a static IP address, there’s already a way to handle those.

From: otrs-bounces@otrs.org [mailto:otrs-bounces@otrs.org] On Behalf Of Gerald Young
Sent: Wednesday, March 27, 2013 10:51 AM
To: User questions and discussions about OTRS.
Subject: Re: [otrs] IP from header

I think he's got an internal situation where he needs the ip of the submitting user... If dhcp, I don't see how that's necessarily going to help, and if it's static, (IMO), This can be stored with the Customer information as an additional field.