Hello, I received a note from the list manager complaining that our server has rejected an unconscionable number of message. Has there been some configuration change of the mailing list recently?
There are reasons for the rejections: our SPAM filter. 1. The filter found one set of messages being sent from a blocklisted site (23.83.215.44), and rejected the messages. 2. The filter uses a greylist to decide about the validity if a sender (nearly 2/3 of spam is rejected this way). The list does not retry delayed messages? This particular site (or IP range) is often blocklisted. $ host 23.83.215.44 44.215.83.23.in-addr.arpa domain name pointer crimson.oak.relay.mailchannels.net. ----[ sample of Blocklisted IP ]---- 2018-08-13_10:53:45 82822-18122 [Worker_1] [TLS-in] [TLS-out] [FromMissing] 23.83.215.44 <[email protected]> to: [email protected] [scoring] multiple (2) 'From:' header tags found ( DoNoFrom ) 2018-08-13_10:53:45 82822-18122 [Worker_1] [TLS-in] [TLS-out] [FromMissing] 23.83.215.44 <[email protected]> to: [email protected] [scoring] missing or invalid address in (2) 'From:' header tag(s) ( DoNoFrom ) 2018-08-13_10:53:45 82822-18122 [Worker_1] [TLS-in] [TLS-out] [DNSBL] 23.83.215.44 <[email protected]> to: [email protected] [spam found] (DNSBL, 74.6.131.124 listed in safe.dnsbl.sorbs.net) [Re users httpd Problem setting up ssl] -> /usr/local/bin/assp2/spam-yes/18122.eml; 2018-08-13_10:53:45 82822-18122 [Worker_1] [TLS-in] [TLS-out] 23.83.215.44 <[email protected]> to: [email protected] [SMTP Error] 554 5.7.1 DNS Blacklisted by safe.dnsbl.sorbs.net 2018-08-13_10:53:45 82822-18122 [Worker_1] [TLS-in] [TLS-out] 23.83.215.44 <[email protected]> to: [email protected] finished message - received DATA size: 10.95 kByte - sent DATA size: 0 Byte 2018-08-13_10:53:45 82822-18122 [Worker_1] [TLS-in] [TLS-out] 23.83.215.44 <[email protected]> to: [email protected] disconnected: session:7F62DD6BBCE0 23.83.215.44 - processing time 4 seconds 2018-08-13_10:53:45 [Worker_1] Worker_1 will sleep now ----[ end ]---- ----[ sample of greylisted response ]---- 2018-08-13_01:52:11 [Worker_1] Worker_1 wakes up 2018-08-13_01:52:11 [Worker_1] Connected: session:7F62FA585BC0 23.83.215.32:20236 > 192.168.69.246:25 > 192.168.69.246:125 2018-08-13_01:52:11 [Worker_1] 23.83.215.32 info: got STARTTLS request from 23.83.215.32 2018-08-13_01:52:12 50332-03786 [Worker_1] [TLS-in] [TLS-out] 23.83.215.32 <[email protected]> info: found message size announcement: 6.94 kByte 2018-08-13_01:52:12 50332-03786 [Worker_1] [TLS-in] [TLS-out] 23.83.215.32 <[email protected]> to: [email protected] recipient delayed: [email protected] 2018-08-13_01:52:12 50332-03786 [Worker_1] [TLS-in] [TLS-out] 23.83.215.32 <[email protected]> to: [email protected] [SMTP Status] 451 4.7.1 Please try again later - are you for real? 2018-08-13_01:52:12 50332-03786 [Worker_1] [TLS-in] [TLS-out] 23.83.215.32 <[email protected]> to: [email protected] disconnected: session:7F62FA585BC0 23.83.215.32 - processing time 1 seconds 2018-08-13_01:52:12 [Worker_1] Worker_1 will sleep now ----[ end ]---- -- James Moe moe dot james at sohnen-moe dot com 520.743.3936 Think.
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