Milter "can't read SMFIC_OPTNEG"

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pingu
Posts: 7
Joined: 10 Dec 2020 08:07

Milter "can't read SMFIC_OPTNEG"

Post by pingu » 03 Mar 2021 19:14

Hello,

I run a high traffic server and lately I've been seeing these errors in the Maillog just after the servers stops processing incoming emails:

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Mar  3  postfix/cleanup[152480]: warning: milter inet:127.0.0.1:8891: can't read SMFIC_OPTNEG reply packet header: Success
Mar  3  opendkim[1618]: OpenDKIM Filter: accept() returned invalid socket (Numerical result out of range), try again
Netstat shows:

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netstat -an | grep 8891
tcp      126      0 127.0.0.1:8891          0.0.0.0:*               LISTEN     
tcp       17      0 127.0.0.1:8891          127.0.0.1:41374         ESTABLISHED
tcp        0      1 127.0.0.1:41426         127.0.0.1:8891          SYN_SENT   
tcp       17      0 127.0.0.1:8891          127.0.0.1:41156         ESTABLISHED
tcp        0      0 127.0.0.1:41114         127.0.0.1:8891          FIN_WAIT2  
tcp       17      0 127.0.0.1:8891          127.0.0.1:41444         ESTABLISHED
tcp       18      0 127.0.0.1:8891          127.0.0.1:40706         CLOSE_WAIT 
tcp       17      0 127.0.0.1:8891          127.0.0.1:41112         ESTABLISHED



After I reboot the eFa-project servers, the emails resume processing and the incoming queue starts to go down in count.
I've looked everywhere and cannot find the cause for this.

Does anyone here have any experience with the "can't read SMFIC_OPTNEG" error?

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