The PRONTO Online service is often configured to send document notifications to your users using a "FROM" address in your Internet domain.  These email may be flagged as SPAM because they are being sent "from" you by a server that is not part of your domain.

For example, an email from "you@yourdomain.com"  is being sent by the email server "po.alphatrust.com", which is not part of your "yourdomain.com" Internet domain.

You should ask your domain administrator to add the following information to your domain name servers (DNS servers):

Add "include:po.alphatrust.com" to all SPF records that cover email sending domains that you use.  These records are maintained in your DNS servers.  Your DNS administrator can assist you.