Include a link in your email message rather than an attachment
If the information you would like to attach is available on a Web page, link to that Web page in the body of your email rather than attaching a file. Anyone will be able to view the link using a Web browser.
Avoid sending large email attachments
Users of any email service usually have a limit on the size of their email Inbox. Sending large email attachments may cause some of your recipients to exceed their quotas. If a file is larger than several megabytes, you might want to compress it into a smaller file
Note: Express eNotices must not include attachments. To speed the delivery of your eNotice, we recommend following the above recommendations.