With above method to increase attachment size is a little complex, but if you have Kutools for Outlook- a handy Outlook addin, you can change the attachment limited size as you need as quickly. Kutools for Outlook, Includes 100 powerful features and tools for Microsoft Outlook 2016, 2013, 2010 and Office 365. Outlook for Mac Sync Errors.17193: 'The total attachment size exceeds the limit. Try removing one or more attachments before saving or sending'. This limit prevents your computer from continually trying to upload very large attachments that exceed the limits of most Internet service providers. This limit applies whether you are adding one large attachment that is greater than 20 megabytes (MB) or several attachments whose sum total size is greater than 20 MB. I installed Office 2010 Pro + x86 onto a virtual XP Pro system (fully patched). With a different user I composed an email and tried to add 2 attachments (total size 22MB). Got the same result - 'The attachment size exceeds the allowable limit'.:( It appears the problem is with Outlook 2010.

When I try to send a message with some attachments, I get the warning that my message is too big to be sent.

How can I increase the attachment size limit?

The attachment size limit, or actually message size limit as it includes all your attachments and the message itself, is determined by the sending size limit configuration of the mail server that you are using.

However, when you are using Outlook with a POP3 or IMAP account, Outlook could also nag about exceeding the allowable limit set by the server, even though you didn’t.

By setting a Registry value, you configure when Outlook starts reminding you about the total message size or disable the nag screen completely.

Outlook might not actually be checking with the server for the limit at all.

Outlook 2007 and previous

Basically any error or notification that you are getting in Outlook 2007 and previous about the message file size is either coming from the mail server you are using or the mail server of the recipient of the message.

When the message is too big for the recipient, you usually get a bounce message in return. This message is also known as a Non Delivery Report or NDR. The text within this message will tell you more about why it bounced.

When you try to send a message that is too large for your mail server, you could also get a NDR back but the message could also get stuck in the Outbox and you’ll start getting Send/Receive Errors.

For Outlook 2007 and previous, you can prevent yourself from sending messages with attachments that are too large by using this this workaround.

Outlook 2010’s, Outlook 2013’s and Outlook 2016’s attachment limit

Outlook 2010 and later have a built-in warning system for attachments that are too big to be sent.

Upon attaching a file or multiple files that will make you go over the message size limit, you’ll get an error and Outlook will not allow you to add the attachment(s). This is in order to prevent the message from becoming stuck in the Outbox and to prevent you from needlessly uploading such a large attachment.

When you use an Exchange or Outlook.com account, the information about the maximum allowed size is obtained directly from the Exchange server. Contact your Exchange administrator about the possibilities of increasing your sending size limit if needed.

When you are using a POP3 or IMAP account to send your message, then this information can’t be retrieved from the mail server. Instead, Outlook assumes a default maximum combined size of all attachment of 20MB for these mail account types.

Attachment size warning in Outlook 2010

Bug for picture attachments
Sadly, this warning is also being given when you add more than 20MB worth of pictures but have the option to “Resize Image Attachments” enabled. This would of course have reduced the attachment size to less than 20MB so the warning should not been shown. Workarounds are to either resize the pictures before attaching them or to increase or disable the limit as indicated below.

Increasing the attachment size limit for Outlook 2010, Outlook 2013 or Outlook 2016

If your ISP allows for a larger or smaller message size and you want Outlook to match this limit, then you can increase or decrease this limit via a Registry tweak.

If you are connecting to an Exchange server, then you do not need to modify anything as Outlook automatically retrieves the limit from the Exchange server.

To configure the limit, add or modify the following value in the Registry:

Key: HKEY_CURRENT_USERSoftwareMicrosoftOffice<version>OutlookPreferences
Value name: MaximumAttachmentSize
Value type: REG_DWORD

The value that you need to use is in KB. So if you know the amount of MB supported by your ISP, then you need to multiply that by 1024 to get the value that you need to enter. To allow for an unlimited size, you can set the value to 0.

Examples;
2MB-> 2048
5MB-> 5120
10MB-> 10240
50MB-> 51200

Note 1: Increasing the limit in Outlook does not increase the limit set by your ISP or administrator on the mail server. If their limit is set to 5MB and you send a file larger than that, you’ll still get sending errors about the message being too big. In that case, you can break down the large attachment, share it via Cloud storage such as OneDrive or DropBox, or use a (secure) file upload service.

Note 2: When setting the limit, you might want to account for the message size and some overhead as well. Typically, deducting about 100KB should do the trick unless you also directly embed pictures in your message or signature.

Jul 05, 2021 • Filed to: Recover & Repair Emails • Proven solutions

Outlook error code 17193 is a typical problem that you get while sending a mail with attachments. You might get a long message stating that the total size of the attachments exceeds the limit, and you'll have to remove one of the attachments before sending/saving it. Just like any other error, it affects how efficiently Outlook works. For one thing, you can compress the file and try sending it again to resolve the issue.

But if you're facing Outlook error 17193, this article is just for you. Read on to know about the root cause of the issue and various measures to avoid it.

Part 1: Main reasons causing Outlook error code 17193

There are numerous reasons responsible for the occurrence of such an error. One of the best ways to avoid Mac Outlook error 17193 is to understand different aspects of the root cause of the problem. We have mentioned some of the critical reasons resulting in the error.

Hardware Issues

Often the overused hard drive or inability to store PST files by it is one of the responsible factors for the error. It leads to the corruption of PST files and the loss of the emails as well. The damaged hard drive also results in multiple errors that prohibit access to PST files. Moreover, there are three types of hardware failures that cause the problem. It includes,

• Data Storage Device Failure
• Network Device Failure
• Unexpected Power Failure

Software issue

Usage of unlicensed software affects not only the way your system works but also its PST files. It would be best if you use genuine software instead of a pirated one.

Virus Attack

Malware or virus intrusion is a real culprit for Outlook error code 17193. Not only does it affect your system, but also the PST files. If you are downloading or importing data from an untrusted source, it would be best if you use antivirus for safety reasons.

Abruptly closing Outlook

Unsafe closure of Outlook can damage your PST files. It could also lead to inaccessible or corrupt PST files. Hence, it is essential to save and exit Outlook safely.

PST file size error

If you are using an old version of Outlook and the size of your PST files is over 2GB, it might get corrupt.

Part 2: Measures to avoid Outlook error code 17193

As briefly mentioned earlier, there are various ways to prevent Outlook error 17193 in the first place. The fact that it can also lead to more errors, including error 0x800ccc0f, 0x800ccc90, and various others, it cannot be ignored. Here are some of the key measures to avoid errors in the future.

Keep the safe limit for Outlook PST file

Setting a safe limit of 15-20 GB on your Outlook PST files is helpful to ensure that the PST files don't get affected by Mac Outlook error 17193. The fact that Outlook 2003 & 2007, supports file size of up to 20 GB and Outlook 2010, 2013, and 2016 supports up to 50 GB, setting a limit would be a great option to entertain.

Distribute the email load

Outlook 2013 and onwards versions are equipped with an option to create multiple PST files. It allows you to create new PST files and transfer the emails once you hit the set limit of 10-15 GB limit. Not only will it help you to manage PST files efficiently, but it prevents them from getting full.

Try Outlook Inbox repair tool

If it’s a minor PST file corruption, you can use an inbuilt tool ‘scanpst.exe.’ Although 'scanpst.exe' works best to handle minor PST files corruption, it is not a practical option for repairing big PST files.

Using Professional Outlook PST Repair tool

If the size of your PST files is huge, Outlook error 17193 can corrupt the files itself. In such a scenario, you won't be able to resolve the issue using the scanpst.exe process. Moreover, it doesn't support the large PST files. Furthermore, in this case, one of the best ways to fix Outlook Error 17193 is by using a third-party application that can fix your PST files.

Stellar Outlook repair is one of the reliable software tools that work best in such a scenario. Download & launch the software application on your Mac computer and follow the steps mentioned below to repair PST files.

Step 1: Add PST file

As when you launch the application, a window will pop up with the option ‘Select PST files for repair.’ Now, click on the ‘Browse’ button and select the PST files that you want to repair.

Step 2: Repair the PST file

Outlook 2016 Total Attachment Size Exceeds The Limit

Now, choose all the PST files and tap on the 'Repair' tab. It might take some time as the software scans PST files and depends on the size of the PST file.

Step 3: Preview and save

Outlook 2016 Mac The Total Attachment Size Exceeds The Limit

Once the scanning and repair process is completed, you will get the preview of repaired files. Click on 'Save Repaired File' to save the repaired files. Before doing so, you must select the format of the file, its path, and click on 'OK.' You will get a message saying that the file has been saved at the desired location.

The Bottom Line

Outlook error 17193 can affect the PST files of your system and the overall performance of Outlook. If you know know the source of the error, it can be resolved in no time using 'scanpst.exe.' And if that doesn't help, you can rely on Stellar Outlook Repair to solve the error and repair the PST files.

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