With reference to your email of [date]
Stress 'ri-fe-RI-men-to' on the third syllable; 'sua' sounds like 'SOO-ah'.
Use this phrase to open a reply when you want to anchor your response to a specific previous message. It is standard in formal Italian business correspondence.
This is the Italian equivalent of 'Further to your email'. It sets a professional tone from the first line. The possessive 'sua' (formal 'your') signals respect for the recipient. Always follow it with the relevant date or topic.
In risposta alla sua email di ieri
In reply to your email of yesterday
Use when replying the next day
Come da sua precedente comunicazione
As per your previous communication
More bureaucratic, used in large organisations
Seguito alla nostra conversazione telefonica
Following our telephone conversation
When switching from spoken to written
Italian business emails almost always open with 'Gentile' (formal) or 'Egregio/Egregia' (very formal, used for officials). Starting directly with the topic without a greeting is considered rude.