bigneno on "[Plugin: WP Mail SMTP] Delay when sending from theme"

Hi,
I have a very strange problem with smtp.googlemail.com.
I use Google Apps for business, my configuration both on plugin settings page and G.Apps panel is 100% ok. Debug tool always says TRUE. When I send a test message it's delivered instantly, but when I use wp_mail in my theme, every message is delivered after few hours.
Can you help me with that?

http://wordpress.org/plugins/wp-mail-smtp/