Email blacklists are long lists of IP addresses. IP (internet protocol) addresses are essentially a computer's address on the internet. If a domain has violated or has been accused of violating email security standards, they'll end up on an email blacklist check. Organizations and sometimes even individuals moderate these lists. When you send an email, it is assigned a spam score. You usually are reported for repetitive high spam scores by email recipients, who alert their email service provider they've received spam by clicking "mark as unsafe" or "report spam." Service providers design these functions to increase email deliverability of the emails their clients want, and monitoring the email delivery of the emails they don't want.
To stay off an email blacklist, check your emails before sending them by running them through a spam filter. Spam filters check for words, phrases, and punctuation that look suspiciously spam-like. Subject lines are particularly important when trying to increase your email deliverability. For example, when writing a good subject line, make use of this prime real estate and compel readers to open your emails. Exclamation points tend to look unprofessional and an overuse of them looks like spam. If you must use exclamation marks, use them moderately. Many people think that using "free" in a subject line is a huge mistake, but using "free" isn't necessarily bad. However, do not use "free" as the first word in your subject line, in conjunction with an exclamation point, or write a word in all caps... this will make it look like spam. The biggest red flag to spam filters and email recipients is a subject line written in all caps, so write your subject line like it's a sentence, with just the first letter of the sentence capitalized along with proper nouns (names, places, brands, specific products). Or, you can choose to write the subject line like a headline, with only the first word of the headline and keywords capitalized.
Just as there are procedures to be added to it, there are guidelines to being removed from an email blacklist. Check the particular organization's protocol for removal from the list. If the particular blacklist doesn't allow removal, it's usually because after a period of time IP addresses are automatically removed for good behavior. However, continuing to send out emails from an IP address that's been blacklisted could result in being permanently added to a blacklist. Email delivery of email marketing emails and newsletters can obviously make or break your campaign, so regularly undergo an email blacklist check to protect the integrity of your company and its IP address.
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