Just recently, I received an automatic message saying that someone had filled out an application to join a site. The message read as follows:

User Timothy Foster asked to join one of your site Wikidot Community. View all member applications

This sentence could be written in better English:

Timothy Foster has applied for membership on Wikidot Community, one of your sites. View applications for this site.

• The word User is not necessary since only users can apply to sites anyway.
• "applied for membership on" and "asked to join" are interchangeable. Either phrase works.
• "one of your sites" was moved to the end to make the sentence flow better.
• The View applications link is made more specific; it only views applications for the site, not all applications across sites you own

I hope this helps.