Stripo — FREE Email Template Builder: drag-n-drop Html Email Editor
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A Complete Guide To HTML Email — Smashing Magazine
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GitHub - dhilipsiva/email-template-generator: Email Template Generator. Generate responsive, maintainable & unified templates for Sendgrid, Mandrill, etc. Using SASS, Pug and common layout.
HTML Email Generator
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Custom HTML Email Template Builder - MailerSend
Free email template builder - Responsive mail editor and designer | Mosaico.io