I am getting delayed email messages

Hello TechyV Readers,
I am encountering issues with my Microsoft Outlook 2007. I am encountering an issue with my emails. I am getting delayed with emails. I understand that usually, this happens when a big file was sent . But, I did a test message with nothing much in it – just a test word and took 30 minutes before I got it. I got a settings of 3 minutes to automatically send and receive. And I also manually clicked on send and received.
With this, I disabled my Antivirus software first, but it is still the same.
Badly need help.
Thanks.
