Whitelisting authenticated servers

[Nigel Kendrick]

Hi,

All our mobile phones have just been blocked from sending mail as a range of
IP addresses belonging to UK Vodafone seems to have made it on to a number
of RBLS. It there a simple way to whitelist authenticated users (MS,
postfix, dovecot, SASL) rather than the dodgy stopgap of whitelisting our
sending domain?

Thanks

Nigel Kendrick