We have customers such as Professional Associations with mailing lists on the order of 10,000 to 20,000 recipients, and Chilkat SMTPQ seems to be a good solution for them. However, Chilkat does not cater to bulk emailers, nor do we intend to add features that make it easy to send email to millions of people. (I don't mean to imply that your intent is bad, but I only wanted to explain our outlook on bulk email features.)
About the log files: Chilkat SMTPQ will only generate log files for emails that fail.