i'm trying to figure out the originating IP of an email sender by looking at some headers. this email is from a gmail account --> a .edu email address (1) 10.100.7.xxx (private network) (2) 10.100.140.xxx (the same private network) (3) ag-out-0708.google.com (a google outgoing mail server) (4) recipient's IP I don't see the IP of the computer that the user sent the email from (the computer used to get to gmail.com) anywhere in here. this is a different email, this time from one gmail account --> another gmail account, both using gmail.com (1) 10.150.52.10 (2) 10.151.135.10 so this is one address on a private network to another. i'm assuming these are just two servers within gmail's system. Is it correct that if gmail is sent from the website (as opposed via POP or IMAP), that the sender's IP won't show up in the headers? so, instead the first originating IP will be a google server?