Bulk Emailing Tips to avoid blacklisting.
If your email design ready, email lists ready and a bulk smtp server to send campaigns then before sending emails you need to take care of the following tips.

Avoid sending emails to purchased lists
Use shuffeled email lists which has all the email addresses mixed, yahoo, gmail, aol, b2b etc…
Avoid sending spammy words in subject line and message body i.e coupon, discount, Test, Sale, Offer, Free, Shop etc…
Use standard html with inline CSS with embeded images in code.
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