Change 'Reply To' Email Address

Change your Salesforce 'Reply To' email address

In Salesforce Classic

1. Click your name. 
2. Click My Settings.
3. In the Quick Find box, enter My Email Settings.
4. Update the "What email address would you like to use as your return address?" field to the desired "Reply To" email address.
5. Click Save.

In Lightning Experience

1. Click your avatar.
2. Click Settings.
3. In the Quick Find box, enter My Email Settings.
4. Update the "What email address would you like to use as your return address?" field to the desired "Reply To" email address.
5. Click Save.

Notes: 

• To complete the email update, the User must click the verification link sent to their new email and complete the verification steps within 72 hours.
• There are also some system settings that control the 'From' and 'Reply' addresses such as 'Send Case Notifications from System Address' in 'Support Settings' and 'Deliverability Options' in 'Setup.'

See Also:
Specify 'From' address for customer notifications on a Case Comment.