We do not send out message for each and every post made to a thread. It is sent only once based on the last visit time to the site and the time the next post is made. If 10 posts are made before you return, you still will only get one message. When you return, you will then get another message that a post was made to a subscribed thread.
Hope this helps.
Note...I show two messages sent today when I just looked at the log...
Time Received: 02/08/07 19:48:57
To:
REMOVED@yahoo.com
Subject: Reply to post 'Excel HT Ticket Maker rev. 4.1.2 (9/2/04)'
Action: Allowed -- Deliver
Delivery Status: Delivered
Source IP: fractalmirror.avsforum.com[216.66.21.30]
Delivery Detail: 250 ok dirdel
ID: 1170982137-51b2004e0000-G0vR85
and
Time Received: 02/08/07 17:48:15
To:
REMOVED@yahoo.com
Subject: Reply to post 'Excel HT Ticket Maker rev. 4.1.2 (9/2/04)'
Action: Allowed -- Deliver
Delivery Status: Delivered
Source IP: fractalmirror.avsforum.com[216.66.21.30]
Delivery Detail: 250 ok dirdel
ID: 1170974895-2e3900ad0000-G0vR85
Regards,