Delivering emails to Inbox has never been so complicated as many think. Here are some simple tips that have been tested with various ISPs including yahoo, gmail, aol and others. The list is not comprehensive, but we are making attempts to add as we learn.
Subject Line:
The subject line should be appropriate to the body of the message. The subject should not contain question or exclamation marks. But if you intend to put them, test the message with different ISPs and see if it doesn't land in spam or junk folders. The sibject line should not contain spaced out text or spaces between characters in a word. The subject line should not contain more spammed words like credit card, and such. Make it short. Make it actionable.
Links in the Body:
Make sure that all links are proper (not broken) and working. Make sure that the links are not on any black lists. Whenever you add a new link to your message, check if it is not black listed. There are many websites, but here is one, where you can check the link if it is black listed.
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