Answer:
WorldPosta requires connectivity to the Internet. The endpoints below should be reachable for customers using WorldPosta:
a) worldposta.com
b) www.worldposta.com
c) mail.worldposta.com
d) tools.worldposta.com
e) autodiscover.worldposta.com
f) imap.worldposta.com
Also below ports:
a) 443
b) 465
c) 993
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