Phrase "Send your feedback(s) to xxx@yahoo.com"

[Twilit1988]

My dear and respected teachers,

1: "Send your feedback to xxx@yahoo.com" OR "Send your feedbacks to xxx@yahoo.com" ?

2: "I want to send you something via fax." OR "I want to send you something through fax." ?

3: "Someone gave me 30 pages to compose.All are written in English." ?

[Mister Micawber]

.
1: "Send your feedback to xxx@yahoo.com"
2: "I want to send you something via fax."
3: "Someone gave me 30 pages to translate/edit/read/copy?. All are written in English."
.
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Native English teacher at Mister Micawber's