Easymailing - Email Marketing platform. User friendly and beautiful design
SaaS Pages - 900+ Screenshots of the best SaaS landing pages
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Landing Pages in MailChimp - Easy to build, custom landing pages for free
FromDoppler - Doppler is an email marketing solution to create, manage and analyze newsletter marketing campaigns.
Good Landing Page - Curated landing page examples for design inspiration