Is the mailbox rule effective when received?

The mailbox rule states that an acceptance of an offer is effective once it is sent, not when it is received by the offeror. This means that as soon as the offeree dispatches the acceptance, a binding contract is formed, even if the offeror has not yet received it. However, the rule can vary depending on jurisdiction and the specific terms of the contract, and exceptions may apply, such as in cases of revocation or miscommunication. Overall, while the mailbox rule is generally effective, its application can depend on the circumstances surrounding the communication of acceptance.