PilotMailer
Test your HTML emails before sending them
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Hunter's comment
PilotMailer helps you to test html mailer before you can sent to anyone,as we find many issues regarding the mails,this is not a bad idea to test first before sending to anyone.
You can test multiple reciptents at once.
Include a plain text version of your email
Save the tested emails easily
Simple website with awesome navigation
Auto Inline CSS which makes things very interesting
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Hunter: 
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