A declaratory phrase, (implying "you"), is an excellent name form for a site offering this type of service/app and I think your name fits it's intended purpose very well. However, the inherrant weakness of this particular name comes from the sheer number of ways that the idea can be expressed using other words/phrases, (ie checkip, emailip, sendip, myip, ezip, mailip, instantip, ipaddress, myipaddress, whatismyip, getip etc.), which has the effect of diluting the name's strength and, therefore, it's value.
"SendIP"
"Email IP"
Additionally, there are already several apps that perform this service that are currently available on the market, (although, the last software that I was using for this purpose, conflicted w/ another prog on my OS and had the habit of crashing my email client.) This could possibly help your cause, however, because there is a large enduser base to search, and if you could find an enduser w/ a weaker name and convince them that they would be better of w/ your name...?
Best of luck. :tu:
Note: Just posted some names relating to this at:
Expired Domains