Cannot resolve PTR record stopping relay?

My wife has a Nokia 9300 phone that I'm trying to set up the email for. My sendmail is rejecting her relay with a "Relaying temporarily denied. Cannot resolve PTR record for 166.129.241.44". I know why you wouldn't normally want to relay from an address that can't be resolved but if the connection is authenticated I don't think it is a too serious a risk. Is there any way to disable this feature?

Thanks,

--

Knute Johnson
email s/nospam/knute/
.

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