[gunkle]

not sure about yahoo but in Gmail if you got to the Settings tab (top right of screen) and then Forwarding and POP/IMAP tab on new screen you will need to choose one of these options
Enable POP for all mail (even mail that's already been downloaded)
Enable POP for mail that arrives from now on

then pick a setting here
When messages are accessed with POP(???????????)


and after that is a link to walk you through "configuring your email client". To my knowledge setting up mail2 web is similar to setting up outlook so that would be the directions i would suggest looking at.
The plus to taking the time to set this up instead of forwarding all the mail is any mail you get from this account you can reply to from same account. If you set up forwarding you end up replying with a different account. Now there is also and option for IMAP4 and I know that mail2web supports it this would be used if you were to say check your mail at multiple computers and devices and would like to have more control over how much of the message gets downloaded. ie. only see headers on phone and choose which to download but PC sees whole of every email

As far as Yahoo see if you need to do a similar setup in yahoo or if they even offer you to pop the account.