If you want to increase the Outlook Attachment Size Limit on your emails, you have to obey the following steps:
#What is outlook attachment size limit how to#
How to Increase the Outlook Attachment Size Limit? Sometimes you will see that Outlook will refuse to deliver an email if you are sending a mail with a video of size 200 MB video, however your mail server will allow you to deliver messages up to a size of 25MB if your attachment is only a little above the default 20MB Outlook Attachment Size Limit then you may change Outlook’s default to match the size of the mail server’s default. You can also skip on receiving back the messages that are undelivered in case the file size exceeds Outlook’s default size. However you can give instructions to Outlook to deliver messages that exceed the Outlook Attachment Size Limit of 20 MB given that your email server lets it. Outlook doesn’t deliver out email messages that go beyond the outlook attachment size limit of 20 MB according to its default settings even though other email programs do let an attachment size up to 25 MB. You can also avoid getting undeliverable messages if Outlook's default is larger than what you can send through your mail server.Email marketing and newsletter concept, Hand of man sending message and mobile phone with email icon Outlook File Size Limitīy default, Outlook does not send email messages with attachments that exceed 20 MB, but many mail servers allow 25 MB or larger attachments. If your email server allows larger attachments, instruct Outlook to send messages larger than 20 MB. In this case 25 MB is: 25 x 1024 KB = 25600 KB.Ĭlose the Registry Editor. So, the equation to determine the decimal number depends on the MB of storage you want to use. Because of these differences, regedit uses 1024 KB to equal 1 MB. That's because regedit uses a different measurement system than you may be familiar with. You may be confused that 25600 KB equals 25 MB. Reduce the Outlook limit by 500 KB to allow wiggle room. The limit corresponds to your mail server's limit.Most mail servers have a size limit, so 0 is not recommended you may get large messages back as undeliverable. For no attachment file size limit, enter 0.The default value (when MaximumAttachmentSize is not present) is 20 MB or 20480.
#What is outlook attachment size limit windows#
When your mail server allows messages up to 25 MB and your attachment is slightly over the default 20 MB limit, change Outlook's default to match the mail server's default size.īefore making changes to the Windows Registry, back up the Registry so that if you make changes, you can restore your system to its original state. When sending an email attachment in Outlook, you may receive an error message warning you that the attachment size exceeds the allowable limit. How to Increase the Outlook Attachment Size Limit Instructions apply to Outlook 2019, Outlook 2016, Outlook 2013, Outlook 2010, and Outlook for Microsoft 365. This article explains how to increase the maximum Outlook attachment size limit. The attachment file size limit in Outlook cannot exceed your mail server's limit.Enter the desired size limit in KB (up to 25600).Open the Windows Registry Editor, find the entry for Outlook, and change the value of MaximumAttachmentSize.Match Outlook's size limit to your mail server's size limit What to Know
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