I’m using WP 3.0.1 with ContactForm 7 2.4.1 and Contact Form 7 to DB Extension 1.4.1.
When using WP Mail SMTP 0.8.6 or Configure SMTP, it appears to override whatever is inputted into the “From:” Email field in the contact form and replace it with the default admin email.
However, the From: Name field is NOT overridden, oddly enough.
Looking at the email headers, I noticed two Return-Path headers, one with the default admin email and another with the email from the contact form submitter. I’m not sure if this is an issue with CF7 or WP-Mail-SMTP, but I’ve notified you both!