How can I Integrate omnisend with erpnext?

Getting error with Gmail during email sending when the number is 50+. Planning to move omnisend for email sending. In current system I’m using ERPNEXT ecosystem to send email. Where I prepare dynamic content based on different calculation and informed erp which template (pre developed) should it use during email send. There is other option to send generated dynamic email body by erp mail rather select template.

Any workaround?