Hi,
at the moment I must create a trigger with different expressions to get the properties of the item not directly related to trigger firing in an action mail.

for example:

(item1 = 0 | item2 = 5) & _alwaystrue_(item3)

or:

(item1 = 0 | item2 = 5) | _alwaysfalse_(item3)

now I can get the values from item3 with {ITEM.LASTVALUE3} and ID with {ITEM.ID3}, but sometimes its not quiet easy to get a value like alwaystrue or alwaysfalse

Realworld scenario:
we have a blackout and our UPS is on battery (first mail) now I want to get every XZ minutes a mail with UPS voltage and autonomy time (next mails) without a a new action...

Update: yes, {host:item.function()} notation can solve the first part of the problem, but workarounds are still needed to get item ID. id() trigger function could help.