Overview of maximum email attachment size per provider

Error message if attachment size is exceeding the limitation

Depending on your e-mail program, e-mail provider, … you may see one of the below error messages when trying to attach or upload a file to your e-mail, or when trying to sentt the concerned message.

Attachment size exceeds the allowable limit.
The file you're attaching is bigger than the server allows. Try putting the file in a shared location and sending a link instead.
552: Message size exceeds maximum permitted
System Undeliverable, message size exceeds outgoing message size limit
The size of the message you are trying to send exceeds the global size limit of the server. The message was not sent; reduce the message size and try again

Maximum attachment file size: Google Gmail

Gmail is the popular e-mail service from Google. It is very likely you are also using a @gmail.com mail address as your personal mail provider. Or if you are professional, you may be using a cusom domain and be using G Suite.

Google has the following information on their Gmail Help website about sending attachments:

You can send up to 25 MB in attachments. If you have more than one attachment, they can’t add up to more than 25 MB. If your file is greater than 25 MB, Gmail automatically adds a Google Drive link in the email instead of including it as an attachment. Learn more about Google Drive attachment sharing settings.


Maximum attachment file size: Microsoft Outlook.com, Office 365, Hotmail

The file size limits for attachmens are the same for @outlook.com, Office 365 (custom e-mail address) and @hotmail.com users: these are all Microsoft e-mail products and the same rules apply.

Microsoft has the following information to share about limits:

The attachment size limit for files is 34 MB. You can also share a file from OneDrive. This way, your recipients can receive larger files and collaborate on it in real time. The attachment size limit for OneDrive files is 2GB.


Maximum attachment file size: Zoho Mail

Zoho is increasingly propular as a CRM suite. One of their products is Zoho Mail, which starts with a free tier.

While composing emails, you can add attachments up to 10MB. Please note that this is the total attachment size. This is inclusive of the attachments included in the email templates also.


Maximum attachment file size: Yahoo Mail

While Yahoo is losing market share, it is still very much used in the world to have a @yahoo.com personal mail address.

The sum of all attached files in a single message, both for incoming and outgoing email, must not exceed 25MB in total file size.


Overview of attachment size limitations

Email providerExample mail addressAttachment size limitSource
Gmail, G Suite@gmail.com25MBSend attachments with your Gmail message
Outlook, Hotmail, Outlook 365@outlook.com, @hotmail.com34MBSending limits in Outlook.com
Yahoo@yahoo.com25MBMessage size limits in Yahoo Mail
Zoho MailCustom10MBWhat is the limit for email attachments?


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