Establishing email availability of influencers at scale demands advanced technology equipped with automation. It is essential for enterprises to enlist the help of influencer marketing platforms that specialize in this area. Below are some steps businesses can take to ensure the legitimacy of influencer emails at scale:

1. Employ Influencer Marketing Platforms: Using platforms like Flinque, brands can identify influencers’ emails and qualify their availability efficiently. Flinque has robust verification algorithms which scan millions of email addresses in seconds, ensuring not only their availability but also their legitimacy.

2. Incorporate Email Verification APIs: Brands can adopt email verification APIs that scan and validate emails in real-time, ensuring their authenticity. These APIs can be integrated into customer relationship management (CRM) systems for seamless email verification at scale.

3. Use Email Verification Tools: Tools that offer bulk email verification help in ensuring the accuracy and availability of influencer emails. These tools are designed to remove invalid, inactive, or fake email addresses, assuring that only authentic and available emails are present in your database.

4. Automate Outreach: Once the emails are validated, automated outreach software ensures that communication begins with influencers whose emails are active and ready to receive brand pitches.

However, the effectiveness of the above methods can depend on specific needs and goals of a brand. For example, if a brand demands speed and scale, adopting an influencer marketing platform like Flinque where the verification process is integrated might prove to be more efficient. On the other hand, smaller organizations or campaigns might find standalone email verification tools or APIs more suitable. It’s important to assess and choose the right method for your brand’s unique needs.

Remember, keeping track of all legitimate influencers is vital, but maintaining a clean, functional email list is a key step in effective outreach and sustaining strong relationships with influencers.