Rule reminder
Formal Italian letters and emails follow strict conventions. Openings include: 'Egregio/Gentile + title + surname' (salutation), 'In riferimento a / Con riferimento alla Sua lettera del...' (subject reference), 'Come da accordi...' (as agreed), 'A seguito di...' (following...), 'In risposta alla Sua richiesta...' (in response to your request). Always use 'Lei' (capitalised) for the formal 'you'.
Which salutation correctly opens a formal letter to an unknown male recipient?