Understanding Outbound SMTP Service And How To Delete Messages Manually From The Outbound SMTP Lined Folder

What Is An Outbound SMTP Service?

When you hit the ‘Send’ button on an email, significant background processes occur to transfer your message from your server to another server worldwide. The SMTP server handles these email transfer processes. Outbound SMTP assists in delivering your email to the designated recipient without obstacles.

Think of it like a relay race where team members pass a baton from one person to another until reaching the finish line. Similarly, the message is passed from one SMTP server to another until it reaches the destination, which is the email recipient.

How Does An Outbound SMTP Service Work

When you hit ‘send,’ the outbound SMTP server is immediately notified. The server adds the email to its delivery queue and checks the email details if no other messages are pending. Based on the recipient email address, it contacts the recipient’s SMTP server to notify about the incoming email.

Once the recipient server approves, the email is successfully delivered to the recipient’s SMTP server. If the email address is correct, the message reaches the recipient’s inbox; otherwise, it returns to the sender’s SMTP server.

Why Your Business Needs An Outbound SMTP

Despite mobile phones, SMS, and messenger apps dominating digital communication, emails remain a primary communication mode. Email is an indispensable component of the business world and an integral part of your information systems. Enterprises use email to contact customers, suppliers, vendors, and partners.

Email server downtime causes significant losses for organizations. For individuals, service interruptions may be inconvenient; for corporations, a single email can make or break a contract. Therefore, organizations must set up a highly dependable and reliable SMTP server.

Small businesses unable to afford paid SMTP services and those sending fewer than 100 emails daily can utilize free SMTP services.

How To Delete Messages Manually From The Outbound SMTP Lined Folder

When your outbound SMTP service gets clogged, you must clear the message queue in the outbound SMTP folder manually. A clogged queue delays mail sending and creates complications. You can manually remove email messages to allow SMTP to resume operations.

For Exchange servers, the system automatically handles congested messages. However, manual intervention becomes necessary if automatic processes fail. Access the SMTP outgoing message queue folder on your exchange server, typically found at C:\program files\exchsrvr\mailroot\vsi1\queue folder.

Step-by-Step Process

In this folder, you’ll find numerous files with .eml extensions — these are messages waiting to be sent and queued in the outgoing SMTP pipeline.

• Sort the email messages; the first waiting message typically blocks others from sending
• Stop the SMTP service before deletion, as attempting to delete while running may prevent removal with “in use” messages
• Delete the blocking message to allow outbound SMTP to resume services
• If unsuccessful, backup the messages first
• Once you identify and delete problematic messages, restart the SMTP service
• The SMTP server should resume sending messages
• If not working, you may have deleted the wrong message — repeat after stopping the SMTP service again
• Continue repeating until the SMTP email service resumes normal operations
• Consult exchange server event logs to determine the underlying issue cause

Conclusion

For businesses, an outbound SMTP server is a must-have as it helps you a great deal with email marketing. If you need to send hundreds of bulk emails daily, consider adopting a paid outbound SMTP service to eliminate email delivery concerns permanently.