All internet service providers (ISP) have limited capacity for files attached to an email from 5 MB to 50 MB depending on the service. It is not a better service the higher the limit of the file size that I can attach, it must be taken into account that this limitation in the traffic of attachments is for your own safety and to favor the agility in the operation of our email and not collapse the mailboxes of our recipients.
Sometimes, it might occur that the email message attachment you’ve sent to someone has an error or is corrupt and thus, limits the recipient ability to open the file. Another factor is the size of the file. All email servers limit the size of the file attached in an email that a recipient can receive mainly because of security reasons. Google Mail, for instance, only allows you to send 25MB only. This might limit the ability to attach files to e-mail messages as well.
