On 26/01/17 18:45, Thomas Hager wrote: > While binding its listen ports, Exim tries to set TCP_FASTOPEN via > setsockopt() on the sockets the daemon created. All of these calls fail > with ENOPROTOOPT.
Aha, right. You're running on too old a kernel, and I can use that result (from the setsockopt) in children of the daemon to condition use of sendto() (TFO active connections) for auxilary connections (such as to rspamd). I should probably override transport configuration of hosts_try_fastopen too. > The SMTP session to the Google MX is handled traditionally with > socket(), connect() and sendto(). Presumably you'd not set hosts_try_fastopen; the default in 4.88 is empty. -- Cheers, Jeremy -- ## List details at https://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/
