Exchange 2010 mail size

The maximum email size in Exchange 2010 is 20 MB (megabytes). This is the default maximum size for emails sent and received through Exchange 2010. However, this size can be adjusted by the Exchange administrator to a maximum of 25 MB.

Here are some key points to note about email size limits in Exchange 2010:

  1. Default maximum size: 20 MB
  2. Maximum allowed size: 25 MB (can be adjusted by the Exchange administrator)
  3. Minimum allowed size: 1 KB (kilobyte)
  4. Email size limits apply to both incoming and outgoing emails
  5. Attachments are included in the email size calculation

If an email exceeds the maximum allowed size, it will be rejected by Exchange 2010 and an error message will be returned to the sender. To avoid this, you can either:

  1. Reduce the size of the email by compressing attachments or removing unnecessary content.
  2. Use a third-party email client or service that allows larger email sizes.
  3. Contact your Exchange administrator to request an increase in the maximum allowed email size.

It's worth noting that Exchange 2010 also has a maximum attachment size of 10 MB, which is separate from the overall email size limit. This means that even if an email is within the 20 MB (or 25 MB) size limit, attachments larger than 10 MB will still be rejected.