There are a lot of reasons for not receiving the emails in Outlook which are given below-
There can be Temporary mail server problems-
For solving this problem check the mail server connectivity. If there is a problem receiving emails, you should perform a telnet check of the connection between your computer and the appropriate port depending on the email protocol your Outlook is set to use for receiving emails.
There can also be the problem of Wrong Outlook Express settings-
The solution for the problem is to use the correct mail settings.
Incoming mail server (POP3/IMAP server): mail.yourdomain.com
Outgoing mail server (SMTP server): mail.yourdomain.com
Username: the full e-mail address like firstname.lastname@example.org
Password: If you are not sure what your email password is we strongly recommend that you reset it from your Panel > Email Accounts.
Another issue faced while receiving the emails is the Exceeded space quota of the email account-
The solution for this problem lies in checking the email Quota. If you have exceeded the quota of your email account, you will not be able to receive any more email messages. You should either remove some of the old messages or increase the space quota of your email account. You can check each account’s disk usage from.
Incorrect MX records of the domain is also one of the reasons for not receiving the emails in outlook-
The solution lies in checking the MX record of your domain name
The Mail Exchange (MX) record is a part of your DNS zone and it determines which server is currently handling your emails. You can check your MX record from the following website.