если кто-то ищет код, я сделал это сам.
if (appdelegate.dataarray.count> 0) {
NSMutableArray * dataarrrr = [appdelegate.dataarray objectAtIndex: 0];
NSLog (@ "% @", [dataarrrr objectAtIndex: 0]);
NSString * aa = [dataarrrr objectAtIndex: 0];
NSMutableArray * myArray = [aa componentsSeparatedByString: @ ","];
NSString *n = [myArray objectAtIndex:0];
NSString *m=[myArray objectAtIndex:1];
NSString *Message = [dataarrrr objectAtIndex:1];
NSString *new = [Message stringByReplacingOccurrencesOfString: @"<Dear User>" withString:n];
controller.body = new;
controller.recipients= [NSArray arrayWithObject:m];
controller.messageComposeDelegate = self;
[self presentModalViewController:controller animated:YES];
}