How to increase email inboxing

Here is a step to step guide on how to increase in-boxing of your emails.

Using Double Opt-In List 

Utilizing double opt-in significantly reduces hard bounces from your email list. Users must verify their email addresses by clicking a unique verification link they receive in their inbox. If the people on the list haven't signed up or heard of your brand, they may mark your emails as spam. When emails are sent to a purchased list and recipients mark them as spam, it sends a negative signal to spam filters. This can result in other emails being automatically sent to the spam folder, leading to reduced deliverability, low engagement, and ultimately no return on your efforts.

Improve the reputation of your domain

You can engage with your own team or send replies to emails. The more engagement your domain receives, the better its reputation will become. If you find this process time-consuming, you can also consider outsourcing domain warm-up to companies like Ample Market or Inboxally. Alternatively, if you already have a domain with a good reputation, you can authenticate it and gradually increase the volume of emails you send.

When recipients engage positively with your emails, it sends a strong signal to spam filters, increasing the likelihood of your emails landing in the inbox rather than the spam folder. This helps maintain high deliverability rates, fosters better engagement, and ultimately maximizes the impact of your efforts.

Clean Up Your List

Email list cleaning involves removing inactive and inaccurate data from your email database. Sendverify  Improve the deliverability of your email list by automatically cleaning all emails before sending them.

From' or 'Reply-To' Address

Make sure to fill out these fields in your email campaign.

Tips for Subject Lines:

  1. Avoid using 'too-good-to-be-true' subject lines.
  2. Steer clear of spammy words used to make claims or extravagant offers like '100% off', 'free', '$$$', 'chance', 'password', and 'guarantee'. You can easily find a long list of these words on Google.
  3. Refrain from writing subject lines with exclamation marks or capitalized words.

Watch Your Content

Email content should pass through the spam filter’s checks. Keep the following points in mind:

  1. Use correct spelling and grammar.
  2. Take time to edit and proofread. You can use services like Grammarly to assist you. Link only to genuine sites with reputable domains.
  3. Avoid shortening your links.
  4. Don’t send long emails that feel like novels.
  5. Maintain a balanced image-to-text ratio.

Unsubscribe Link

Sendx provides an automated unsubscribe link with every campaign sent. You may make changes to it if required by selecting Settings > Account preferences and the Unsubscribe footer.

Email Authentication

Two major technical categories that you should care about when trying to improve the delivery rate of emails are

  1. Email Authentication
  2. Sender’s IP Reputation

Having email authentication systems in place is an essential step in building trust. Make sure the domain is whitelisted. Even when you follow all the content and email hygiene guidelines to keep yourself off the blacklist, you might still experience high bounce rates just because you share an IP with other senders.

It is recommended to purchase a dedicated IP. Here are a few benefits of having a dedicated IP:

  1. Dedicated IP addresses allow you to maintain a good IP reputation.
  2. They are the best way to ensure complete control over email's destiny.
  3. It isolates your email reputation, protecting it from email senders with poor practices (e.g., shared IP Pool senders).

To purchase a dedicated IP, simply reach out to our support team, and they will provide you with guidance on the process. When transitioning to a dedicated IP, it's important to warm it up gradually to ensure optimal performance.


In this comprehensive guide, we've outlined crucial steps to ensure your bulk email campaigns are effective and avoid the pitfalls of spamming. By employing double opt-in procedures, maintaining a clean and engaged email list, and adhering to best practices for content creation, you're setting the stage for success. Remember, authenticating your domain and carefully managing your sender's reputation are essential for achieving high deliverability rates.

For more details, refer to How to Send Bulk Emails Without Spamming.