Please read this post it is related to your issue: http://www.oxwall.org/forum/topic/11727

I use the older yahoo, but my customers with gmail are having the largest issue.
My rest has not given me any problems. I did a search for Invitation and didn't find anything
they all say they get a email that looks like the attached

Ipod/Iphone is a problem maybe more then email provider.

Ez Street, I checked invitations sent to my gmail e-mail account the links are clickable. There's something wrong with the settings of your e-mail account. Yahoo also works well, link is clickable. 

its not my email account( works for me ) its over 25 other would be members

I understand that, the only thing I can say related to the issue is that the software sends mails both in txt and html, all parameters and headers are ok as well, which is why the links should be clickable.However we can't say for sure how e-mail client will process these e-mails. 

 I changed the settings to anyone can join, and have to have my approval. Ipod with just the url still get this. see attached

attached this time

Got my android back today, same deal. No signup option on the Mobile.

I'm sorry I don't understand you want your members to join via Mobile version?

 I started sending them a link to the site to "join"....based on the % of people cant click on the invitation I sent them. A lot of folks are mobile. They can not sign up on iphone/ipad or android based off what I have found. Is this right?

Yes, this is how it works now. There's no sign-up via mobile browser