I am working with Newsletter in Magento 2.
I have follow this link http://blog.belvg.com/newsletters-in-magento-2-0.html to Configure NewsLetter in Magento 2.
After Queueing Newsletter, admin side changes status "Not Sent" to Sent.
But, throws an error in CustomerSupport: sender address must contain a domain
newsletter_problem table and Report-> NewsLetter Problem in admin side.
But, All the Mail function working fine like subscription mail, new account mail.
Suggest me why this problem occur and how to solve this.