Subject line: @{username} <> {company name}

Hi {first name}

My name is {your name}, and I am in charge of influencer marketing at {company name}.

{personalization based on their most recent posts, interests, life events, etc.}

Would you be open to contributing a guest post to our blog?

Your post could be {the main benefit}. How do you feel?

Looking forward to your response!

Cheers,
{your name} from {company name}