EngageBay marketing tools enable you to send an email to individual contact directly from the contact record or from the associated company. 

To send one-to-one emails,

i. Navigate to the Marketing dashboard. 
ii. Go to Contacts > Contacts. 
iii. Click on the Three Dots (...) right next to the contact to whom you want to send an email. 
iv. Choose Email. It will pop up a new panel from the left. 
v. Enter all the basic email details and then hit Send. If you want, you can even Schedule sending the email at a later date and time. 
Please check the video: