NetProspex, a website where sellers can buy/exchange leads, just released the Sales Lead Toolkit with some cool tools you might find helpful:
Company Email Pattern Lookup: Use this tool to select a company and find the email pattern for that organization.
Email Checker: Use this tool to evaluate the validity of an email address without actually sending one to a recipient. It can also be used to verify a group of email addresses.
Leads by URL: This tool helps you quickly find contacts in your target companies just by inputting a target company URL. Use the search feature to select your leads by title, job function or geography.
Hopefully, they'll help you find the right person to contact in those big companies.
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