Over the last couple of years, pressure from government and the market have caused ISPs (internet service providers) to be much more strict when accepting emails into a user’s inbox. While there are many factors that can cause an email to go to spam or be completed rejected by a server, below are a few that will cause even the most normal, well-intentioned emails to “mysteriously” not get delivered.


  • DMARC, DKIM, SFP settings. Without getting too technical, these are important settings that are not typically configured by your email hosting service by default. What these do, bottom-line, is legitimize you as a sender of emails coming from your domain name.  For example, some spammers can “spoof” or pretend to be sending from your email address. So, if you aresending from [email protected] and your domain name and host does not have samplecompany123.com configured correctly, you may be sending emails that are not making it to your client’s inbox. And that goes for your whole staff! Your domain may be on a blacklist that is shared by multiple ISPs. To get off the blacklist, contact your hosting provider for assistance.
  • Sending to an illegitimate/bought list. DON’T SPAM! Whatever you do, only send to users who request to hear from you. Not only is this the ethical way to do business but it also prevents your business from being blocked by ISPs. Once a user hits “spam”, you can begin showing up on blacklists.

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