Bridgewebs does NOT allow Attachments in Bulk Emails for a number of reasons:

• It would take longer to send, especially with a high number of recipients, as each Email is constructed individually.
• This is much more efficient than sending large documents through email
• A Bulk Email with an attachment is more likely to be treated as Spam
• Users, these days, are or should be very wary of opening Attachments
• Users may just Junk an email with an attachment and result in not receiving any more emails

If you do want to bring a particular document to a user's attention, you will need to upload the document to your club Web Site and send a clearly labelled email and link to suggest they open the link to view the document on the web site.

You can use the bulk email facility to include a link to a document from your site, which the recipient will be able to click and view. 

First upload your document to the Document library , see 14.2 Document Upload

From Web Admin - Membership - Email members tab

Select who you want to send the email to and build the body of the message , see 15.4.1 To send "Bulk Email"

If you just want to send  a link to one document. In Section 6 Link , select the document from the drop down list.

Alternatively, for better visibility or to include more than one document link, use the editor

 
Select the insert Document Link (Book Icon above). A pop-up box will be shown

Select the document required from the drop down list and rename the Link Title if required. Press Ok.

Repeat these steps for each document.