My abc@gmail.com is forwarded to aaa@zohomail.com it means every time abc received email it will also forwarded to aaa,

For example. supplier@company.com send email to my abc@gmail.com and my aaa@zohomail.com will also receive this.

If I want to reply using the aaa@zohomail.com on the email, without the supplier@company.com knowing that its from the zohomail account, how we will do that? the supplier@company.com should know that the reply is still from the abc@gmail.com account even if the one that reply is the aaa@zohomail.com account. 

Please help. Thank you