Send bigger attachments using Gmail email service, Google increased the maximum attachment size limit from 20 MB to 25 MB. So, now if you are going to send an email with a 25 MB attachment from your Gmail to a person who is not using the Gmail email service then first make it sure either his email service supports to this big attachment limit or not. Otherwise it would be a problem for receiver if he can not open that big attachment file.

Gmail’s Flash uploader doesn’t allow to upload files that are larger than 10 MB. The error message is “attachment failed”. So first set uploader settings to the basic uploader, this will solve the problem.

Via