Sometimes mails can be directed to the Spam or Junk folders, for no reason and even though they shouldn't be treated as such.
Make sure you search through all those folders thoroughly and see if the emails you were expecting ended up there.
Maybe your email address "refuses" to receive emails.
To test and resolve this issue, try sending an e-mail from another account (account A) to your own account (account B) and see what happens.
Did the e-mail message bounce (failed to send)? If it did, you will receive a return message, on account A that the delivery wasn't successful, as well as possible reasons for that.
You can also check your e-mail address's validity here.
If your email address is valid and it still "refuses" new emails, check out the emails don't get delivered / bounce solutions.
If you are keeping important emails in your mailbox, which you can't delete, but you are unable to receive new emails, consider increasing the storage quota of your email address, i.e. the number of emails you can store in your mailbox.
Check your email service provider's website to see if they offer that as an option.
You may have accidentally activated an email filter which filtered your emails, which explains the reason you are not able to see particular emails.
Check your email filters and make sure that they are set up correctly.
Note: If you are not sure how to find the filters (if any), check the email-service provider's help page.
Maybe you can send emails, but you can't receive emails, because you (or your email service provider) have accidentally changed the port number(s).
Check out this article for tips on where to find and change the port numbers, BUT please note that the port numbers shared in the article apply only to GreenNet and not to other email service providers (visit their website to find their port numbers).
Maybe bad DNS settings are the reason why you can't receive emails. Contact the support staff of the email service you are using or visit their website and ask for the correct DNS settings (and follow their instructions).
If you want to change your DNS settings and use the ones of Google, feel free to check the don't know how to change the DNS settings guide.
If you don’t receive the email in the next 2 minutes please check your junk folder, and add [email protected] to your safe sender list.