Me and my brother live in the same apartment and use the same internet connection. (A WiFi router with WPA2 password).
He uses Microsoft Outlook as his primary email tool and I noticed that his POP and SMTP port settings were to use ports 110 and 25 respectively, which means he sends and receives his emails in the clear.
I know that the mail and the credentials are also passed to the servers in both POP and SMTP.
My question is, if someone visited the home and we gave him the WiFi password, and my brother was sending and receiving emails at the same time, is there a one the other person can get his password? (For example by Sniffing via Wireshark)
The settings of the outlook are as below.