How to Change Store Email Addresses in Magento 2

You can have up to five different email addresses to represent distinct functions or departments for each store or view. In addition to the following predefined email identities, there are two custom identities that you can set up according to your needs.

• General Contact
• Sales Representative
• Customer Support

Each identity and its associated email address can be associated with specific automated email messages and appear as the sender of email messages that are sent from your store.

Changing Store Email Addresses is one of important tasks when you start selling on Magento 2. To change store email address you can do the following steps

To change Store Email Addresses:

• Step 1: Set Up the Email Addresses for Your Domain
• Step 2: Configure the Email Addresses for Your Store
• Step 3: Update the Sales Email Configuration

Step 1: Set Up the Email Addresses for Your Domain

Before you can configure email addresses for the store, each must be set up as a valid email address for your domain. Follow the instructions from your server administrator or email hosting provider to create each email addresses that is needed.

Step 2: Configure the Email Addresses for Your Store

• On the Admin sidebar, click on Stores. Then under Settings, choose Configuration.
• In the panel on the left under General, choose Store Email Addresses.
• Expand the General Contact section, and do the following:

• In the Sender Name field, type the name of the person to appear as the sender of any email messages that is associated with the General Contact identity.

• In the Sender Email field, type the associated email address.

• Repeat this process for each store email addresses that you plan to use.

• When complete, click  Save Config

Step 3: Update the Sales Email Configuration

If you use custom email addresses, make sure to update the configuration of any related email messages, so the correct identity appears as the sender.

• In the panel on the left, under Sales, choose Sales Emails. The page has a separate section for each of the following:
  • Order and Order Comments
  • Invoice and Invoice Comments
  • Shipment and Shipment Comments
  • Credit Memo and Credit Memo Comments
• Starting with Order, expand the section for each message, and make sure that the correct sender is selected.

• When complete, click  Save Config .

Ref: Magento 2 user guide