Hi the most improtant thing you must do first is make suree your marketing list is accurate, up to date and that all the addresses within the database are valid.
This will make sure your hard bounce rate is low which will protect your sending reputation and in turn help the performance and inbox placement of your campaign.
I would recommend running your list through Email Checker before sending to it so you can make sure you are going to get the best open rates and deliverability.
Also if you Enter CHECKER10 at checkout, you will get a 10% discount off your order.
The quality of your email list is one of the many factor that can impact your email deliverability. Here are some common factors that harms your email deliverability.
Negative Sender Reputation: Maintaining a positive sender reputation is vital to the success of your email program. Sender reputation is an indication of the trustworthiness of an email sender’s IP address and sending domain. Mailbox providers take various metrics into consideration to determine your sender reputation, including spam complaints, mailing to unknown users, industry blacklists, and more. Find out your sender reputation at senderscore.org.
High Complaint Rates: The key to email marketing is to ensure you are sending relevant and timely emails to people who want to receive them. If you aren’t, then you are opening yourself up for subscriber complaints. And the more complaints you receive, the worse your email deliverability can become. Keeping your subscriber complaint rate low is crucial to maintaining a positive sender reputation and high deliverability rates.
Getting Listed on a Blacklist: In the world of email, there are whitelists, greylists, and – of course – the dreaded blacklists. A blacklist is a list of domains and/or IP addresses that have been reported to be “known” sources of spam. They are available to the public and exist to help mailbox providers protect their users from unwanted email. If your practices or your content look spammy, you could wind up being blacklisted, regardless of whether or not you’re a legitimate, permission-based sender.
Poor List Quality: Maintaining a high quality subscriber list is imperative to ensuring your emails are delivered to the inbox instead of the junk or spam folder. In addition to complaints, there are three other major culprits of poor list quality: spam traps, unknown users, and inactive users. You can easily improve the quality of an email list by using an email validation tool MyEmailVerifier
Lack of Email Authentication: Authentication allows the receiver of an email and the mailbox provider to confirm the identity of the sender. If the identity of the sender cannot be authenticated, mailbox providers may reject the message or put it through additional filters to determine whether it should be delivered.