LinkedIn Corp. has redesigned its InMail for Sales Navigator to help sales professionals deliver customized messages, in the first major update since the company announced added Gmail and Salesforce.com integration in July.

The redesigned client enables sales people to scroll through the profile of a sales prospect and insert relevant information about their experiences. Users can find common connections, shared groups and recent LinkedIn activity and include those details a message to personalize the communication.

Users can also now attach documents within InMail, an important feature for delivering sales collateral and proposals. The redesigned inbox also now uses conversation threading so users can keep their communication history in order.

Sales prospects increasingly “tune out messages that they deem generic,” wrote Thomas Lee, a senior product manager at LinkedIn in a post on the LinkedIn Sales Blog. “Personalized messages have always generated the greatest response rate, but keeping track of what every prospect is doing, and knowing when to engage them, is time consuming and hard to learn.”

In announcing 23 percent growth in revenue in what will probably be its final quarter as a public company before its pending acquisition by Microsoft, LinkedIn said premium subscriptions brought in roughly 17 percent of its $960 million in quarterly revenue and that Sales Navigator is its strongest premium subscription product. The company also said it now has 467 million members.

The enhancements will roll out to all Sales Navigator users over the next few weeks. Pricing starts at $64.99 per month.