There are businesses out there that have the same customers as you but which aren’t rivals – a home builder and a mortgage broker, for example. 

You can use that to your advantage by forming a marketing partnership with these complementary businesses. 

They send your email marketing to their database; and, in return, you send their marketing to your database. 

If you pick a partner that’s reputable and that aligns with your values, these email marketing partnerships can be a clever way to get in front of more customers.