Sender Score/Reputation: There are services that can give you information about your sender reputation. For example, Google Postmaster will tell you if your domain or IP reputation is high, average, low, or very bad in the Gmail view, as well as spam complaint rates, etc. If you see your reputation dropping, that’s a good sign to take corrective action (like narrowing down your list or pausing to let things recover). Some tools even give you a composite “score” out of 100. While you don’t have to obsess over a single number, these can be helpful in spotting problems early. Check your reputation regularly—it’s like checking your credit score for email. If something seems off, investigate.
In addition to your own send metrics, you can use external tools to test before and after you send. For example, some services will let you send an email to a bunch of test addresses at various ISPs and then show you whether they ended up in your inbox or spam and why (they often provide spam filter feedback). These tools can be great to run on a new template or a particularly important chiropractor email address email to catch problems early. They might flag issues like missing authentication, your domain being blacklisted, or content that looks like phishing. If you find your domain or IP on a blacklist (via these tests or a site like mxtoolbox), you’ll need to investigate removal, but preventing this through best practices is the best approach.
Track deliverability across segments: If you have multiple email types (newsletters, transactional, marketing blasts) or different segments, track them separately. You may find, for example, that your cold prospecting emails have worse deliverability than your customer newsletters. This insight allows you to apply targeted fixes (perhaps prospecting needs more warm-up or list checking). Many companies separate their email flows across different IPs/domains to protect their primary email from problems in another flow – it’s an advanced strategy, but something to be aware of as you grow.