How can i find the dsn

Use nslookup to verify that the destination domain is reachable from the Exchange server. Some messaging systems are configured to compare these values in an effort to reduce spam. The default value on a Send connector is blank, which means the FQDN of the Exchange server is used for example, exchange The Mailbox Transport Delivery service isn't started on the destination server which prevents the delivery of the message to the mailbox. For example, meeting requests or messages with images embedded in the message body.

Replying to old messages, or messages that were exported as files important recipient attributes might have changed. Verify that the recipient's email address is correct. Malformed or missing attributes in contact entries. The sender is blocked by sender filtering directly, or the sender is on a user's Blocked Senders list, and the Sender Filter agent is configured to use safelist aggregation.

For more information, see Sender filtering and Safelist aggregation. ExRecipNotFound; not found or User unknown. The recipient's email address is incorrect the recipient doesn't exist in the destination messaging system. Verify the recipient's email address. You recreated a deleted mailbox, and internal users are addressing email messages in Outlook or Outlook on the web using old entries in their autocomplete cache the X. Tell users to delete the entry from their autocomplete cache and select the recipient again.

The recipient's email address is incorrect for example, it contains unsupported characters or invalid formatting. Receive connectors reject SMTP connections that contain single label domains for example, chris contoso instead of chris contoso.

Invalid address or Unknown sender address. There's a problem with the sender's email address. Verify the sender's email address. The sender has exceeded a message rate limit for example, an application server is configured to relay a large number of messages through Exchange. For more information, see Message rate limits and throttling and Allow anonymous relay on Exchange servers. The message was quarantined by content filtering.

To configure exceptions to content filtering, see Use the Exchange Management Shell to configure recipient and sender exceptions for content filtering. The recipient's mailbox has exceeded its storage quota and is no longer able to accept new messages. For more information about configuring mailbox quotas, see Configure storage quotas for a mailbox. RecipSizeLimit; message too large for this recipient. The message is too large.

Send the message again without any attachments, or configure a larger message size limit for the recipient. For more information, see Recipient limits. The message was determined to be malformed, and was moved to the poison message queue. For more information, see Types of queues. You're using the ABP Routing agent, and the recipient isn't a member of the global address list that's specified in their address book policy ABP.

Receive connectors that are used for internal mail flow are missing the required Exchange Server authentication mechanism. For more information about authentication on Receive connectors, see Receive connector authentication mechanisms.

This error can be generated by the source or destination messaging system. Send the message again without any attachments, or configure a larger message size limit. For more information, see Message size and recipient limits in Exchange Server. A mail loop was detected. There's a DNS or network adapter configuration issue on the Exchange server. A configuration error has caused an email loop. Download PingTools Network Utilities.

Network Analyser is a free iOS app that shows useful information about your network. Next, log in with the username and password. Most of the routers have credentials written on the back. This will override the setting on your Router and now you can peacefully enjoy browsing the web. So, these were some of the ways to find out what DNS server you are using. Depending on the operating system you have, choose the most efficient way.

For more issues or concerns, let me know in the comments below. Pratik works as an In-house writer and video host at TechWiser. Former Programmer, Current writer.

Loves tech in any form, quite optimistic about AI, data science and IoT. Talks extremely less but you betcha can geek out over anything on Twitter.

You must be logged in to post a comment. Pratik Pratik works as an In-house writer and video host at TechWiser. You may also like. October 21, October 20, The first method to find out DNS server in Mac is really simple and straightforward.

You need to just run a command in terminal. Here is another method to find out what DNS you are using in Mac. If you are not a techie enough to use terminal commands, then you might find this method easy to use. This app is free to download on the Google Play Store and works as Android 2. It has no ads and can show a lot more information than you might need.

Since the minimum SDK required for this app is 7, literally this app is compatible with all Android devices available today. Download and open Network Info II application.

Though free version with bottom banner ad does the job, you can still upgrade to pro version to remove ads and support the developer. When you set up your new internet connection, you might have noticed technician configuring your router.

In some cases, this DNS servers will be changed with custom third-party servers to monitor traffic and restrict access to websites. Generally, network administrators in corporate offices, colleges, hostels do this to monitor what their staff or students are accessing.

To view what DNS your router is using, you need to access router settings. IP address of a router admin page will be either Enter username and password of your router to log in. If you are not sure about username and password and if they are unchanged, try admin as username and leave password empty. Depending on the router manufacturer, you need to dig the router settings to find the DNS server details.