victor duchovni dxdewmdieulnutmorganstanleycom wed feb 13 2008 112537am 0700 joseph l casale wrote answer depends volume mail expect receive time low volume nothing suffice mail queue delivered server back victor problem throughout maintenance interval need make sure nothing passed way always delete acl pix hoping elegant way change transport table point destination bogus transport mastercf entry required adding transport defer_transports later undo transport table change reload postfix finally drop bogus transport defer_transports maincf defer_transports deferall transport_maps hashetcpostfixtransport transport examplecom deferalldowntime defer mail examplecom postfix 24 later use retry transport instead dont change defer_transports maincf transport_maps hashetcpostfixtransport transport examplecom retry421 scheduled downtime 24 later deferred transports automatically handed retry transport get control using directly viktor disclaimer offlist followups get onlist replies get ignored please ignore replyto header unsubscribe postfixusers list visit httpwwwpostfixorglistshtml click link response solves problem best way thank send worked thanks followup must respond please put worked thanks subject delete quickly tue 05 aug 2008 234759 0500 hold mail delivery