How to Fix “Mac Outlook Error Code 17099” within Few Seconds?
Microsoft Outlook is a popular email client trusted by users across both Windows and Mac platforms. While Windows users have seen a wide range of Outlook versions over the years, Mac users primarily work with Outlook 2011 and Outlook 2016. Despite its reliability, Outlook for Mac isn’t immune to technical issues. One such issue that many users face is Mac Outlook error code 17099. If you’re trying to figure out how to fix Mac Outlook error code 17099, you’re not alone, this error can be frustrating and disrupt your email workflow.
Error code 17099 usually appears when there’s a problem sending messages through the SMTP server. When this error occurs, users typically see a message stating that the server rejected one or more recipients’ addresses, often due to formatting issues or authentication problems.
Why Does Mac Outlook Error Code 17099 Occur?
If you’ve seen the message “Relaying to prohibited by administrator – email could not be sent”, you’re likely dealing with Outlook error 17099 on Mac. This error typically prevents users from sending emails and is linked to issues with the SMTP server.
Here are the main reasons this error occurs:
- SMTP Server Rejection: This error usually appears when the SMTP server encounters a permanent or temporary failure while processing your email. This can be caused by incorrect server settings, authentication issues, or the server rejecting certain recipients.
- Sending Emails to Too Many Recipients: Outlook for Mac has a default recipient limit (often around 50). If you’re trying to send an email to more than the allowed number of recipients at once, the server may block the message and trigger error 17099.
How to Fix Mac Outlook Error Code 17099: Complete Solutions
If you’re facing Outlook Mac error 17099, there are two primary ways to troubleshoot and resolve the issue, depending on the root cause. Below are the methods you can try:
1. Fixing the Error Caused by SMTP Server Issues
When the error stems from problems with the SMTP server, it’s often linked to a corrupted identity database in Outlook. Rebuilding this database using the Microsoft Database Utility can resolve the issue. Here’s how:
- Close all Microsoft Office applications.
- Go to the Applications folder on your Mac.
- Navigate to Microsoft Office 2011 and look for Microsoft Database Utility.
- Launch the utility by double-clicking it.
- In the utility window, select the identity (OLM file) you want to repair.
- Tick the Rebuild button.
- A progress bar will appear with the message: “Rebuilding Main Identity”.
- Once the rebuild procedure is finish, you’ll see: “Your database was rebuilt successfully.”
- Hit the Done to finish.
2. Fixing the Error When Sending to Large Recipient Groups
If you’re sending an email to more than 50 recipients at once, the default limit in many email systems can trigger error 17099.
What You Can Do:
- Contact your email service provider or system administrator.
- Request an increase in the maximum number of recipients allowed per message.
- Alternatively, divide the recipient list into smaller groups and send multiple emails to avoid hitting the limit.
Still Facing Issues? Use Mac OLM File Converter for a Hassle-Free Experience
If the manual methods haven’t worked for you, or you’re looking for a quicker and more reliable solution to deal with Mac Outlook problems such as error code 17099, then it’s time to consider using a professional tool.
CubexSoft OLM Converter for Mac and Windows is a powerful and user-friendly utility to help you manage, repair, and convert your Outlook for Mac (.olm) files into 20+ file formats with ease. Whether you’re facing corruption in OLM files, want to move your data to another platform, or simply need a backup, this tool offers a smooth experience without the risk of data loss.
Why Choose OLM Migrator?
- All-in-One File Conversion: Converts OLM files into a wide range of formats including PST, MHT, MBOX, EML, MSG, PDF, HTML, CSV, RTF, DOC, ICS, vCard, Office 365, Gmail, IMAP, Thunderbird, Windows Live Mail, Zimbra, Lotus Notes, Rediffmail, Amazon WorkMail, and so on without much effort.
- Batch Conversion: Save time by converting multiple OLM files in a single go, perfect for large mailboxes or IT administrators.
- Preserves Email Integrity: Maintains the original folder structure, metadata, attachments, read/unread status, and formatting during the conversion process.
- Easy-to-Use Interface: Designed with non-technical users in mind, the tool requires no advanced skills. Just follow a few simple steps and you’re done.
- Works on Both Mac & Windows: No matter your OS, CubexSoft has a version for you. The software runs smoothly on both macOS and Windows systems.
When Should You Use Mac OLM Export Tool?
- You’re unable to fix OLM file errors manually (like error 17099)
- You want to move from Mac Outlook to Windows Outlook
- You need to create a backup of important Outlook data in readable formats
- You’re migrating data to a new email platform (like Thunderbird, Apple Mail, or Gmail)
Try It Today!
OLM File Converter offers a free demo version that allows you to test its features and convert a limited number of items per selected folder. Once you’re satisfied, you can upgrade to the full version for unlimited access.
Final Thoughts
By following the above methods, users can effectively resolve Outlook for Mac error code 17099 and restore smooth email functionality. However, for a more efficient and reliable solution especially when dealing with large or corrupted OLM files OLM File Conversion Tool offers a quick and hassle-free way to repair, convert, and manage your MS Outlook data on both Mac and Windows systems.
