Mar 31, 2015 There is a 20 MB limit on the maximum attachment size in Outlook mail client (including the latest 2010 / 2013 versions). It doesn’t matter if a single large file or several small ones are attached — the total attachment size would not exceed 20 MB. You will be happy to know that even though the size limit for web mail email accounts is 20 MB, the server allows up to 25 MB. So, when we know that the server allows up to 25 MB, this means that there is something we can do to increase the size of the attachment in this case. Let’s learn how the limit for attachment size can be increased. Outlook 2016 for Mac attachment size 25mb According to this question I have a similar situation I have 3 Macbook Pro with OS X version 10.12 and by necessity they had old MS Outoolk 2016 version 15.25 which allow me to send email attachments larger than 25MB (offcourse I have licences for MS Office for Mac 2016). Office 365 (Outlook 2016 Outlook 2013) - Reduce the size of pictures and attachments When you send a message that exceeds the message size limit for either your or the recipient's mail server, the message will be returned to you and not delivered. 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 2016 Folder Limits
- Outlook For Mac 2016 Attachment Size Limit Chart
- Outlook For Mac 2016 Attachment Size Limit Office 365
How to change the attachment size limitation in Outlook?
Sometimes, I can’t insert a big attachment successfully in Outlook, but get a warning dialog box saying the attachment size exceeds the allowable limit. See following screen shots. This error happens due to exceeding the size limitation of attachments in Outlook. In this article, I will guide you to change the attachment size limitation in Microsoft Outlook.
Change attachment limited size with Registry Editor (6 steps)
![Settings Settings](/uploads/1/1/8/6/118604366/620047564.jpg)
To change the attachment size limitation in Microsoft Outlook, you have to modify the parameter of MaximumAttachmentSize in the Registry Editor. And you can do it with following steps.
Step 1: Press the Win + R to open the Run dialog box, enter the regedit in the Open box, and click the OK button.
Outlook 2016 Folder Limits
Step 2: In the coming User Account Control dialog box, click the Yes button.
Step 3: Now the Registry Editor window opens. Open the Preferences folder with following paths:
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Outlook 2016:HKEY_CURRENT_USERSoftwareMicrosoftOffice16.0OutlookPreferences
Outlook 2013:HKEY_CURRENT_USERSoftwareMicrosoftOffice15.0OutlookPreferences
Outlook 2010: HKEY_CURRENT_USERSoftwareMicrosoftOffice14.0OutlookPreferences
Outlook 2007: HKEY_CURRENT_USERSoftwareMicrosoftOffice12.0OutlookPreferences
Outlook 2013:HKEY_CURRENT_USERSoftwareMicrosoftOffice15.0OutlookPreferences
Outlook 2010: HKEY_CURRENT_USERSoftwareMicrosoftOffice14.0OutlookPreferences
Outlook 2007: HKEY_CURRENT_USERSoftwareMicrosoftOffice12.0OutlookPreferences
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Step 4: Click the Edit > New > DWORD (32-bit) Value, and name the new DWORD as MaximumAttachmentSize.
Outlook For Mac 2016 Attachment Size Limit Chart
Step 5: Double click the new DWORD to open the Edit DWORD (32-bit) Value dialog box, check the Decimal option, enter the attachment size limitation in the Value data box, and click the OK button. See screen shot below:
For example, you want to change the attachment size limitation to 100MB, enter the 102400 in the Value data box.
Note: If you do not want to limit the attachment size in Outlook, just enter the 0 in the Value data box.
Step 6: Close the Registry Editor window, and restart Microsoft Outlook.
After changing the attachment size limitation in the Registry Editor window, attachments will be inserted successfully only if their sizes are less than attachment size limitation. See following screen shot:
Change attachemnt limited size with Kutools for Outlook
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. |
Free install Kutools for Outlook, and then do as below steps:
1.Enable Outlook and click Kutools > Options. See screenshot:
2. In the Options dialog, click Other tab, and enter the limited size you want to change to into the textbox besides Maximum Attachment Size section. For instance, here I change the attachment size to 10MB (10240KB). See screenshot:
3. Click OK, and a dialog pops out to remind you restart the Outlook programs for taking effect the change. See screenshot:
After Outlook restart, the attachments limited size has been changed.
![Mac Mac](/uploads/1/1/8/6/118604366/690323893.png)
Tip:
1. If you want to change the attachment size to be unlimited, enter 0 into the Maximum Attachment Size textbox.
2. If you want to set the attachment size to default size, enter 1 into the Maximum Attachment Size textbox.
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Outlook For Mac 2016 Attachment Size Limit Office 365
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-->Original KB number: 2800895
We do not recommend that you change the default location of your Profile folder for Microsoft Outlook 2016 for Mac, or your Identity folder for Microsoft Outlook for Mac 2011 to an external hard disk or to a network. Additionally, using a mail identity or profile that is located on an external hard disk or on a network is not supported in either version of Outlook for Mac.
More information
Outlook 2016 for Mac caches your mail items in a profile in your home folder at the following location:
~/Library/Group Containers/UBF8T346G9.Office/Outlook/Outlook 15 Profiles
Outlook for Mac 2011 caches your mail items in an identity in your home folder at the following location:
~/Documents/Microsoft User Data/Office 2011 Identities
Like Microsoft Entourage for Mac 2008, Outlook 2016 for Mac and Outlook for Mac 2011 are intended to be purely locally cached mail clients. Changing the location or using a mail identity that is located on an external hard disk or a network is not supported.