IPA: /ˈpoʊstəli/
KK: /ˈpoʊstəli/
In a manner related to mail or postal services.
The documents were sent postally to ensure they arrived safely.
Postally → It is formed from "postal" (from Latin "postalis", meaning of or relating to the post) and "-ly" (meaning in a manner of). The word "postally" refers to something done in a manner related to the postal system.
Think of the word 'postal' which relates to mail services, and remember that 'postally' means in a manner related to mail.