Using contact groups can work to create a list of known contacts with imessage capabilities.
Sucks that it can't be done directly on the iphone, but it will transfer over from wherever you sync your contacts from. Whether it's outlook on pc or address book/icloud on a mac.
Create a imessage contact group and stick all known imessage contacts in there. Simple.
Sucks that it can't be done directly on the iphone, but it will transfer over from wherever you sync your contacts from. Whether it's outlook on pc or address book/icloud on a mac.
Create a imessage contact group and stick all known imessage contacts in there. Simple.