Increase character limit in test emails

Hi Ben,

In the new sendy version there's the awesome addition that remembers the last test e-mails campaign was sent to. Is there an option to increase the character limit, as currently it's set to arbitrary cut off everything after 100 characters? Our e-mails follow the structure FirstName.LastName@ourdomainname.com and after the first send out only 3 addresses stay. Any way to increase it?

Thanks for all the updates so far!