Curious what others are doing - we have a sales team that is responsible for prospecting, however we do not have permission to email these people, etc. Sales wants these people in our CRM however we need to be careful with this. What are others doing to manage these type of lists? Using additional lead status to identify them and then marketing suspend them until they engage with us and opt in? Are you not syncing them to Marketo at all? Thanks!
You could also create a landing page or resource center for those specific prospects and have the sales team include a link to that page in their follow-up email or reference the page via phone conversation to opt them into marketing emails.. On the resource page, you can gate some of the assets so that the viewers would be obliged to fill out the form to download the asset. Prospects who fill out the form can be added to a separate smart list for nurturing.
The marketing suspend method sounds pretty workable. If you didn't want to work off some extra field though, you could simply watch for leads created from source=CRM or prospecting or whatever you use, and only open up email when the lead status goes to cold, or some other status that tells marketing it's time to engage.
We actually find more and more that once the leads are in our sales teams' hands, we are enabling them with published, marketing-approved templates more than we are messaging on their behalf. It takes some trust between Sales and Marketing to ensure leads aren't being left behind or neglected (and conversely that Marketing's messaging is good), but it's a very efficient and productive dynamic to reach for both sides of the table.