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Re: [fetchmail] Does Not Resolve

2002-11-10 22:57:18
Quoting from SoloCDM's mail on Sun, Nov 10, 2002 at 12:54:31AM -0700:
When mail, "does not resolve" for ruleset=check_rcpt it becomes
a reject=451 and fetchmail 6.1.0 does not expunge the message for
sendmail 8.12.5.

In my previous versions of sendmail and fetchmail, the message
was expunged by fetchmail and the sender was given an explanation
message by sendmail.

What will fix the problem?

Any 4xx response (like 451) indicates a transient (temporary) error.
This means that the mail could be accepted if retried later. Lookup
failures are normally transient errors as a mail should not get
rejected if a dns server is unreachable or down.

A permanent reject response is of the form 5xx (like 550).

You could tell your smtp server to not lookup any addresses if you are
not keen on checking the sender addresses. This problem typically
occurs if your mail server is not checking the sender addresses, but
your local server is.

Or, you could change the response code to a permanent reject for
lookup failures if you want the previous situation to continue.

Or, you could check your nameserver configuration and query logs for
dns errors.

All these issues are not related to fetchmail directly.

Sunil Shetye.

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