"I replied to her letter."

Translation: J'ai répondu à sa lettre.

[pfeil]

is the preposition "à" really necessary here?

[Sitesurf]

answer to / reply to = répondre à

[ShelbyPinn]

When clicking on her the translations offered are lui and then sa. Why not j'ai répondu à lui lettre ?

[tRldfJ1n]

Why was elle a repondu a son lettre not acceptable? I live in France and the majority of people including the post lady and the people in the post office use the word lettre.

[caffecorretto]

Sa lettre...