Quoting Dave Pooser: > Until I discovered that if pipelining_advertise_hosts is set to all (as per > default) and the sending server is pipelining to 3 users, there's no > response until all three delays have occurred-- and in this case 60s was > enough for the sending server to timeout.
This was changed in 4.67, see the mailing list archive and the changelog: PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set. -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
