user3667: After setting the fee rate with settxfee -- how do I re-allow bitcoind to set the fee automatically again? Or does the settxfee command only apply to the next outgoing transaction?

user5757: Looking at the source code suggests that settxfee 0 should return you to the automatic fee setting.  However this behavior is undocumented and there is a TODO suggesting that it might go away in the future.  Otherwise, you can restart bitcoind.

3667: <p>After setting the fee rate with <code>settxfee</code> -- how do I re-allow bitcoind to set the fee automatically again? Or does the <code>settxfee</code> command only apply to the <em>next</em> outgoing transaction?</p>
 5757: <p>Looking at the <a href="https://github.com/bitcoin/bitcoin/blob/476cb35551f559573c81a3927856b3f76aecd6e9/src/wallet/fees.cpp#L54" rel="nofollow noreferrer">source code</a> suggests that <code>settxfee 0</code> should return you to the automatic fee setting.  However this behavior is undocumented and there is a TODO suggesting that it might go away in the future.  Otherwise, you can restart bitcoind.</p>
