rset_timeout — set the timeout after RSET
rset_timeout = 30
The amount of time in seconds to wait for a response to a
RSET commands are used to reset the state of an SMTP session in which a transaction has only partially succeeded. It allows subsequent messages to be delivered down a single SMTP session immediately following a transient or permanent failure response from the remote server before the complete and successful delivery of the prior message. The default value is
rset_timeout is valid in the binding, binding_group, domain, and global scopes.