First check your POP3 settings, in theemail software (eg. Outlook, Entourage, Thunderbird, Lotus,).
If they are correct, you may need to set a static DNSserver on your computer.
To do that, follow the steps on this document.
Note: This example is for DSL-G604T using Windows XP. Thesame steps applies to other routers like DSL-200, DSL-300T,DSL-502T, DSL-504T, DSL-G624M, DSL-G804V.