Summary: After sending an email if you get an error code 550 5.1.10 in the non-delivery report (NDR), then this post will help you resolve the error and get your email sent. Also, it mentioned an EDB converter tool that can help you extract mailboxes if there is an issue with your Exchange Server or database.
Sometimes, when users try to send an email in your Exchange Server infrastructure, it bounces back with a non-delivery report (NDR) message, with the error code 5.1.10 SMTP; 550 5.1.10 RESOLVER.ADR.RecipientNotFound; Recipient not found by SMTP address lookup. As you can see, the error message says that the recipient is not found. There could be various reasons for this error message. In this post, we will help you to find out the causes of this error and the ways to fix it.
Ways to Fix the Error 550 5.1.10 in Exchange Server
In cases where there is an issue with the Exchange Server and it needs to be re-installed due to a corrupted installation or the installation of a Cumulative Patch (CU) gone wrong, it is suggested to use an application, such as Stellar Converter for EDB. This EDB to PST Converter software can export all the data from your databases without data loss.
With Stellar Converter for EDB, you will be able to open multiple EDB files from any Exchange Server version. You don’t need an online Exchange Server to extract data from your Exchange Server databases. The software offers a clean and familiar Outlook-like interface where you can see the whole structure of your database, along with a full HTML viewer and in-line search. You can granularly export mailboxes, shared mailboxes, disabled mailboxes, and public folders to PST and other formats, such as EML, HTML, PDF, and MSG.
With Stellar Converter for EDB, you can export directly to an online Exchange Server database. In case the Exchange Server is rebuilt, you can easily open the EDB files and export directly to a brand-new database with ease, with manual or automatic mailbox matching. You can export from any version of the Exchange Server database to any Exchange Server version. Other features include VIP (preference) exporting where mailboxes of your choice will be exported first, parallel export to process a few mailboxes at once, and the ability to continue the export if the application is interrupted in any way. You can also use it as a migration tool to migrate to Office 365 tenants.
Ravi Singh is a Senior Writer at Stellar®. He is an expert Tech Explainer, IoT enthusiast, and a passionate nerd with over 6 years of experience in technical writing. He writes about Data Recovery, File Repair, Email Migration, Linux, Windows, Mac, and DIY Tech. Ravi spends most of his weekends working with IoT devices and playing games on the Xbox. He is also a solo traveler who loves hiking and exploring new trails.