|In Poco 3, just sort on the Received column. If it's not visible, check it in Options/Index Columns (for your global default) or in Mailbox Properties/Columns (for a single mailbox).|
There are a couple of options that affect how dates and times are displayed. By default, the message's Sent date will be converted to your local time zone and will display in a shortened format. You can change these options in Options/Reading Mail/Index Options.