Members need to enable e-mailing via their User CP when they register, it's possible the user has it disabled. You can confirm operation of this functionality by clicking my username and checking the drop down options.
If you don't see "Send e-mail to diredesire," there's a post count limitation (although I'm pretty sure there's not one...). Even sillier is the percentage of fake e-mail addresses -- I've had issues trying to e-mail members due to behavior, but getting bounced e-mails. Then they complain if/when they get an infraction or ban with "no warning." Come on... As far as FS/T, this is why sellers should include e-mail addresses in their post(s), but understandably, people avoid doing so due to spam bot crawlers... Due to the way the FS/T is structured, though, it's extremely inefficient not to.
