Hi, I am having the same problem. It works fine with my AOL address but not with Google, I am using the correct settings, I've tried all combinations of settings with no success.
Has anybody found a solution to this problem?
My client uses Google Apps for business and I've just integrated his site with Woocommerce, set everything up to find that all the Woocommerce mail goes in to the junk mail, which is strange because it was coming through fine when using Gravity Forms.
I've been trying to get it to work using the SMTP plugins but seems gmail won't allow it.
Any help is much appreciated!