We just changed from Email 1.0 to Email 2.0 environment. For some reason, the email I created by using Marketo email 2.0 template went to Outlook Junk folder, as "***SPAM*** email. Then, I changed pre-header with two words, such as "January Newsletter", it went to Inbox. If I changed pre-header back or use different one, it all went to Junk folder.
Does anyone shared the same trouble? Does this issue is because of email pre-header? Or maybe other issue related to it?