Question: Apple iOS Mail search syntax
I have searched quite a while and am unable to find any decent description of how I can put together combined searches that would help me track down messages in a very busy professional inbox.
Examples of searches that I am not able to figure out in particular (i.e. either empty lists being returned or results contain messages that are not in line with the criterion):
* specifying the sender as being from one domain (without restricting to specific individual names)
* specifying the type of attachment (e.g. .pdf)
Does anybody have a good reference?
iPad Pro 9.7-inch WiFi, Cellular, iOS 10.3.1