How to Resolve Email Delivery Issues: A Step-by-Step Guide

Email Delivery Issues

Table of Contents

Email is a fundamental communication tool for both personal and professional purposes. However, email delivery issues can be frustrating and disruptive. Whether your emails are bouncing back, landing in spam folders, or not reaching their recipients, addressing these problems promptly is essential. 

Guide to Resolve Email Delivery Issues

This comprehensive guide will take you through the step-by-step process of resolving common email delivery issues.

Check Recipient’s Email Address

The first step in resolving email delivery issues is double-checking the recipient’s email address for accuracy. A simple typo can cause delivery failure. Ensure there are no extra spaces, missing characters, or incorrect domain names in the recipient’s email address. Correct any errors and resend the email.

A correctly formatted email address is essential for successful email delivery. Even a small mistake, such as a missing letter or an extra space, can cause the email not to reach its intended recipient. Verifying the recipient’s email address before sending important messages is good practice to avoid unnecessary delivery problems.

Verify Your Internet Connection

A stable internet connection is crucial for sending and receiving emails. Ensure that your internet connection is active and functioning correctly. If you suspect connectivity issues, try accessing other websites or services to confirm your connection’s reliability.

Your internet connection is the foundation of your email communication. Without a stable connection, your email client may struggle to communicate with email servers, leading to delivery delays or failures. Checking your internet connection is a fundamental step in troubleshooting email issues.

Check Your Outbox

If your email is stuck in the outbox and not sending, it may be due to various issues, such as a large attachment size, a slow internet connection, or server problems. Review the outbox, and if there are unsent emails, try sending them again after addressing any potential issues.

An email stuck in the outbox can be a source of frustration. It’s important to investigate why the email is not sending. Is the attachment too large, causing it to time out? Is your internet connection stable enough to transmit the message? Identifying the root cause of outbox issues is essential for resolving them.

Review Sent Emails for Bounces

Bounced emails were not successfully delivered to the recipient’s inbox. Check your sent emails for bounce-back messages, which typically explain why the email failed to deliver. Common reasons include invalid email addresses, recipient server issues, or exceeded mailbox quotas.

Reviewing bounce-back messages is like getting feedback from the email system. It tells you why the email didn’t reach its destination. Understanding the cause of the bounce allows you to take appropriate action, such as correcting the recipient’s email address or contacting their email provider for assistance.

Avoid Sending Spam-Like Content

Email providers often use spam filters to protect users from unwanted emails. To avoid having your emails marked as spam, refrain from using excessive capital letters, too many exclamation marks, and suspicious attachments. Craft your emails with clear, relevant content to increase the chances of successful delivery.

Spam-like content can trigger email filters, causing your messages to be flagged as spam and potentially never reaching the recipient’s inbox. Following best practices for email content can enhance your email’s deliverability and ensure it doesn’t get mistakenly filtered as spam.

Allow Your Email Address

Ask recipients to add your email address to their contact list or address book. This action, known as allow listing, tells the recipient’s email provider that your emails are legitimate and should be delivered to the inbox rather than flagged as spam.

Allowlisting is a proactive step to ensure your emails consistently reach their intended recipients. It establishes a trusted sender relationship between you and the recipient’s email system, reducing the likelihood of your emails being filtered as spam.

Check Your Email Sending Limits

Email service providers often impose sending limits to prevent spam. Ensure that you are not exceeding the sending limits of your email provider. If you send many emails, consider using a dedicated email marketing service to avoid delivery issues.

Staying within your email provider’s sending limits is essential for smooth email delivery. Exceeding these limits can trigger security measures, leading to email delivery problems. If you need to send a high volume of emails, consider using specialized email marketing tools designed to handle large campaigns while maintaining deliverability.

Monitor Your Domain Reputation

Email providers assess the reputation of the domain sending the email. If your domain has a poor reputation, your emails will likely be marked as spam. To maintain a good domain reputation:

  • Avoid sending bulk emails from free email accounts.
  • Implement proper email authentication protocols like SPF, DKIM, and DMARC.
  • Monitor blocklists and address any issues promptly.

Maintaining a positive domain reputation is crucial for long-term email deliverability. Email providers use domain reputation to decide whether to deliver emails to the inbox or flag them as spam.

Review SPF Records

Sender Policy Framework (SPF) records help email providers verify that the sender can send emails on a domain’s behalf. Ensure that your SPF records are correctly configured to match the email servers you use for sending emails.

SPF records add an extra layer of safety to your emails, verifying that they are sent from authorized servers. This verification helps prevent spoofing and improves email deliverability by ensuring that email providers can trust the authenticity of your emails.

Implement DKIM and DMARC

DomainKeys Identified Mail (DKIM) and Domain-based Message Authentication, Reporting, and Conformance (DMARC) are authentication mechanisms that enhance email security and delivery. Implementing DKIM and DMARC can help improve email delivery rates and prevent spoofing.

DKIM and DMARC provide additional layers of email authentication, making it even more challenging for malicious actors to impersonate your domain. Implementing these protocols helps build trust with email providers, increasing the likelihood of successful email delivery.

Contact Your Email Service Provider

If you have exhausted all troubleshooting steps and are still experiencing email delivery issues, it may be time to contact your email service provider’s customer support. They can provide insights, investigate server-side problems, and offer guidance on resolving complex issues.

Your email service provider has valuable expertise in email delivery. If you’re facing persistent issues that seem beyond your control, their support team can assist in diagnosing and resolving the problem. They may also have specific recommendations tailored to their email infrastructure.

Use an Email Deliverability Service

Consider using an email deliverability service that monitors and improves email deliverability rates. These services provide insights into email performance and offer recommendations to enhance email delivery success.

Email deliverability services offer advanced tools and analytics to help you understand and optimize your email delivery. They can provide valuable data on open rates, click-through rates, and other metrics, helping you fine-tune your email campaigns for better results.

Follow Up with Recipients

If you suspect your emails are not reaching specific recipients, consider contacting them through alternative communication channels, such as phone calls or text notifications, to confirm the correct email address and verify if they are receiving your emails.

Communicating with recipients helps you address delivery issues promptly. It also shows your commitment to ensuring that important messages are received, even if they encounter email delivery problems.


Email delivery issues can disrupt communication and cause frustration. Following this step-by-step guide, you can systematically address and resolve common email delivery problems. Remember that patience and persistence are key when dealing with email delivery issues, as some solutions may take time to show results. Maintaining a good sender importance and implementing best practices in email authentication and content can significantly improve your email delivery rates and ensure your messages reach their intended recipients.

TechGolly editorial team led by Al Mahmud Al Mamun. He worked as an Editor-in-Chief at a world-leading professional research Magazine. Rasel Hossain and Enamul Kabir are supporting as Managing Editor. Our team is intercorporate with technologists, researchers, and technology writers. We have substantial knowledge and background in Information Technology (IT), Artificial Intelligence (AI), and Embedded Technology.

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