We’ve added two new advanced options for Outbound Mail accounts:
- Allow identities on single-user account
- Allow any valid subdomain
These advanced options allow some of the restrictions on single-user and any-user type accounts to be modified. The first one allows the “left hand side” to vary on single-user accounts (such as for identities). The second one allows matching subdomains of the configured domain to be accepted as valid. The default setting for these options is disabled, which preserves the original behavior of the account types.