Anyone tried/tested email tracking for their offline emails?

I am curious if anyone else has tested the various email tracking services mentioned in many of the offline WSO's being sold lately. The ones I am talking about purport to track open rate, and also time viewed and whether certain links inside are clicked on. They also show if the email was opened multiple times.

It has gotten to be a component of many offline WSO's lately. And the fact that most have affiliate programs has probably been the reason for recomending of one or the other.

I'm looking at three such programs, recommended by different WSO sellers: specifically PointOfMail, ReadNotify, and YesWare. There is a fourth who's name escapes me at the moment that was being promoted before these, but as I recall, the cost was prohibitive although the affiliate commision was quite lucrative.

I've only done cursory testing of POM and ReadNotify, but I've tested Yesware more extensively and I've found some issues that I'd like to discuss.

POM and YesWare appear to have similar capabilites and reporting, except that YesWare is about half the cost and has a gmail "app" that installs easily and is quite simple to learn, POM appeared to be a bit more difficult to apply, thus my migration from POM to YesWare.

I was impressed with ReadNotify and the price is comparable to the others, except that the reporting seemed to be overkill for most applications and very difficult to understand and decipher.

My point is, after some preliminary testing of YesWare (16 emails), I'm impressed with the reporting capabilities of the service, but the "open rate" has me concerned. All these emails were sent to test accounts, Gmail, Hotmail, Yahoo, Personal Accounts,et al and the delivery rate sucked!

Seven of the 16 emails arrived in the desired inbox, but nine were relegated to spam. The statistics are still small and irrelevant, and I will be doing more extensive testing, but I was just wondering about others results using the services.

After all, something that records open rates and click throughs is useless if it triggers spam filters on the recipients email client.

Any experience would be appreciated.

Thanks,
Steve