This module will let you build SendGrid's SMTP API headers with simplicity.
pip install smtpapifrom smtpapi import SMTPAPIHeader
header = SMTPAPIHeader()header.add_to('email@email.com')
header.set_tos(['email@email.com'])header.add_substitution('key', 'value')
header.set_substitutions({'key': ['value1', 'value2']})header.add_unique_arg('key', 'value')
header.set_unique_args({'key':'value'})header.add_category('category')
header.set_categories(['category1', 'category2'])header.add_section('key', 'section')
header.set_sections({'key1':'section1', 'key2':'section2'})header.add_filter('filter', 'setting', 'value')header.json_string()