This is my first post here so please take it easy on me.

I am having trouble figuring out the best way to set up the following.
I own 2 domains. Lets call them domain1.com and domain2.com.
domain1.com was the main domain for my old web hosting plan. I have since canceled that account and now any mail sent to those addresses (
anything@domain1.com) bounce back since there are no longer any mailboxes set up for that account. I wasn't aware people were still using the old addresses but apparently they are.
domain2.com is a domain that is part of a reseller plan. I need any emails that are sent to domain1.com to be automatically forwarded to domain2.com. What is the easiest way to do this? I cannot add any add on domains to the reseller accounts. Is there an alternative other than adding another account to my reseller plan to simply forward emails from people still using the old address?
Thanks!!