If you cannot find specific emails in your inbox, it may be due to your folder or filter settings or the setup you use to check your email. Please see the troubleshooting suggestions below.
If you use the POP3 protocol to access your mail.com account via another email program, by default your emails are usually removed from the originating server when you check your email and placed in that inbox. Adjust the POP3 settings in the third-party email program if you wish to leave your messages on the server and keep them available for download to multiple email programs.
If you use the IMAP protocol, depending on your settings your emails will usually be left on the server, but are only accessible when you are connected to the internet. Adjust your IMAP settings if you wish to download emails to see them offline.