When you use sendgrid for email marketing, your emails are normally going to spam.
How can we prevent sending SPAM email?
Sender domain authentication: When you create email campaign, you should config the sender, title, content, etc.
In this case, for setting sender email, you should authenticate the sender domain in sendgrid or other email marketing services.
Sendgrid provides CDATA, and you should register these CDATA in email domain server
For example, when you use admin@hg-world.com email as a sender, you should authentication of hg-world.com email domain server with above method.
