Workarounds are to either resize the pictures before attaching them or to increase or disable the limit as indicated below. This would of course have reduced the attachment size to less than 20MB so the warning should not been shown. 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. Instead, Outlook assumes a default maximum combined size of all attachment of 20MB for these mail account types. When you are using a POP3 or IMAP account to send your message, then this information can’t be retrieved from the mail server.
Contact your Exchange administrator about the possibilities of increasing your sending size limit if needed. When you use an Exchange or account, the information about the maximum allowed size is obtained directly from the Exchange server.
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. 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). Outlook 2010 and later have a built-in warning system for attachments that are too big to be sent. Outlook 2010’s, Outlook 2013’s and Outlook 2016’s attachment limit 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.įor Outlook 2007 and previous, you can prevent yourself from sending messages with attachments that are too large by using this this workaround. The text within this message will tell you more about why it bounced. This message is also known as a Non Delivery Report or NDR. When the message is too big for the recipient, you usually get a bounce message in return. Outlook 2007 and previousīasically 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.
Outlook might not actually be checking with the server for the limit at all. 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.īy setting a Registry value, you configure when Outlook starts reminding you about the total message size or disable the nag screen completely. 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. How can I increase the attachment size limit? When I try to send a message with some attachments, I get the warning that my message is too big to be sent.
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