@jrf,
I don’t think the plugin works. The problem is wp_mail() function didn’t handle $headers properly, not SMTP or mailer’s problem.
Problem also resolved with online chat of Hostgator. Thanks guys for the info.
I found if i upgrade to 1.5.2, it can not pass the XHTML vaildation. Some characters should be double-quote(“) around the value of attribute, but they are single-quote(‘) now!
template-functions-category.php Line:201
I don’t know how many functions have this problem, but i recommand anyone who checkin codes should be more careful.
I tried it but it didn’t work for me. I found if I replace the get_option(‘home’) to the original trailingslashit(get_option(‘home’)), that works!