i have been spending the last week trying to figure out the root cause for this issue
cron php setup correctly , both on server and in magento
updated to mage 220.127.116.11 this is when the problems started
installed aoe scheduler to monitor cron jobs, working fine
have mandrill + mailchimp set up
order confirmation emails are sent properly to the store owner ( can see the emails fine in mandrill outbound queue)
customer however is not receiving any confirmation emails.. , they are just not send ( so not in spam)
admin backend : sales orders confirms this , when viewing an order it says :
Order # 400000026 (the order confirmation email is not sent)
in the comments section on the order it says:
Customer Notification Not Applicable
manually sending the order works
clearly this is a bug in magento
would like/appreciate some help in solving this..
I'm also running into the exact same issue and haven't been able to figure it out yet. I'm on 1.9.3
Have you checked table core_email_queue ?
It should contains one row for each email, and one row for each recipients core_email_queue_recipients
What email type you have there?