Domain user sending mail problem

[robbo007]

Quick question.

Does the default install of ISPCP have any spam blacklist list checks built in?

I have a user who is accessing their email account via pop3 and their ADSL router public IP address is on a spam black list.

Could this affect sending of mail via SMTP?

They can collect pop3 email but not send.

I just want to eliminate the possibility that ISCP has some built in check before troubleshooting further.

Thanks,
Rob