Documents can be inserted as attachments during message composition. Click the Attachments tab to upload your file.
If you can't upload attachments contact support and request that access to attachments be enabled for your account.
Although the system allows you to upload attachments up to 2MB, this is very large and may be refused by the receiving server. We recommend you keep the file as small as possible (e.g. under 300KB and not exceeding 750KB). Smaller attachments are more likely to be delivered successfully.