Delay in incoming email service. Please solve my issue

Delay in incoming email service. Please solve my issue

Respected Sir/Madam,
I host my email service on your Mail Hosting Services. I face some issue on your mail service. The issue on your service is DELAY IN INCOMING MAIL. Due to this problem , delay in our work and we can't communicate our clients on time. My team is worried and upset due to this issue. Another, issue we face my team is mails.sairafabrics.com link is not working some times.
I hope you can understand our problem. You can resolve this issue as soon as possible.

Regards,
Abdul Rahman
admin@sairafabrics.com