In today's digital landscape, sending emails from Virtual Private servers (VPS) is a common practice for businesses and individuals alike. However, many users encounter issues that can affect the delivery of their emails. In this article, we will discuss the main problems with sending emails from VPS and provide guides on how to solve these issues.

1. DNS Records Configuration

The fundamental step to ensure smooth email sending is a properly configured Domain Name System (DNS). This includes:

• SPF (Sender Policy Framework): This record verifies that an email sent from your server is authorized to send emails on behalf of your domain.
• DKIM (DomainKeys Identified Mail): DKIM adds a digital signature to emails, helping recipients verify that the email has not been altered in transit.
• DMARC (Domain-based Message Authentication, Reporting, and Conformance): DMARC utilizes SPF and DKIM to authenticate that an email is legitimate and defines what to do with emails that fail authentication.

Correctly setting up these records helps prevent your emails from being marked as spam or completely blocked.

2. IP Address Reputation Management

The reputation of your IP address plays a crucial role in how Internet Service Providers (ISPs) evaluate your emails. If your IP address is blacklisted, your emails may be automatically blocked or placed in the spam folder. To manage your IP address reputation, it's important to:

• Check if your IP address is not listed on any blacklists.
• Limit the amount of spam sent from your IP address.
• Ensure all emails sent from your server have relevant content and are sent to consenting recipients.

3. Email Server Configuration Verification

Proper email server configuration is essential for effective email delivery. This includes:

• Setting limits for email sending to avoid exceeding ISP quotas.
• Using authentication for all outgoing emails.
• Ensuring all software and applications used for email sending are up-to-date and configured for security.

4. Monitoring and Analysis of Email Delivery

Regular monitoring and analysis of email delivery can help identify and address issues before they significantly impact your reputation. This includes tracking delivery rates, open rates, click-through rates, and spam complaints. These data can provide valuable insights into how your emails are performing and how you can improve them.

Addressing common email sending issues from VPS servers requires a comprehensive approach, including proper DNS configuration, IP address reputation management, email server configuration verification, and regular monitoring of email delivery. By following these best practices, you can significantly improve the success of delivering your emails and ensure that your messages reach their recipients.