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| -rw-r--r-- | doc/doc-docbook/spec.xfpt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt index 9cb1e4972..c3fc1fb21 100644 --- a/doc/doc-docbook/spec.xfpt +++ b/doc/doc-docbook/spec.xfpt @@ -31668,6 +31668,15 @@ configuration as follows (example): .code spamd_address = 192.168.99.45 387 .endd +The SpamAssassin protocol relies on a TCP half-close from the client. +If your SpamAssassin client side is running a Linux system with an +iptables firewall, consider setting +&%net.netfilter.nf_conntrack_tcp_timeout_close_wait%& to at least the +timeout, Exim uses when waiting for a response from the SpamAssassin +server (currently defaulting to 120s). With a lower value the Linux +connection tracking may consider your half-closed connection as dead too +soon. + To use Rspamd (which by default listens on all local addresses on TCP port 11333) |