25
Oct
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Emailology is a website which aims to guide designers and developers with the best practices of e-mail design.
The project includes an e-mail boilerplate, that is very well-commented and includes hacks for cross-client compatibility, for starting quickly.
A knowledgebase lists the tips and tricks categorized for each e-mail client. It is the right place for finding answers to client-specific issues.

There is a standards guide which presents the universally-supported HTML and CSS tags (it is possible to get client-specific data).
And, a character conversion feature allows copy-pasting your own code for converting the special characters into HTML entities.
25
Jun
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E-mail code validation is a painful job considering many e-mail clients/applications have a low-level HTML-CSS rendering support and many others have their own standards. Actually, it is worse than designing for the browser.
Fractal is a free-to-use web application for validating HTML-CSS code across 24 most-popular e-mail clients.
It simply works by pasting the code to the application and finding out if each line is validated, if not, why and in which e-mail clients.

Best of all, Fractal doesn't come with only the bad news but also suggests fixes.
P.S. Besides the desktop and web-based e-mail applications, it also checks the code for the mobile as well.
4
Jun
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There are various new and exciting stuff with the website development like HTML5 and CSS3.
But, when it comes to designing HTML e-mails, it is still the tables and hacks for improving compatibility with different e-mail clients.
HTML E-mail Boilerplate is a project which presents a starting point for HTML e-mail design and includes solutions for the major rendering problems with the most common email clients.
The code is very well documented and the download pack includes a non-documented version).

3
Nov
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CampaignMonitor, an e-mail marketing service, is sharing 100+ professional, good-looking and free HTML e-mail templates.
They are created by several talented + well-known designers and come with the PSD source files for total customization.
All templates are tested in 20+ e-mail applications including the popular ones like Outlook 2010, Gmail, Lotus Notes, Apple Mail and iPhone.

13
Jun
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MailChimp presents 4 free HTML e-mail templates that are well-optimized for most of the e-mail applications.
Templates include a basic newsletter, postcard and 2-column designs.

You can also find newsletter coding tips at the same address and a free e-mail marketing e-book which covers email marketing benchmarks (average open/click rates, bounces, unsubs), how spam filters work & more.
Compatibility: All Major E-mail Applications
12
Dec
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Getting your email to look great in all the major email clients can be a challenge at times, so, Campaign Monitor done the hard work for you with these 30 free e-mail templates.
They’ve tested them in all the major email clients, so add your own content and you’re all set.

Requirements: No Requirements