PowerMTA™ 3.5r16 

Top 10 domains by number of recipients

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Name #Rcpt KBytes #Conn Last Error
fastmail.us 2,039 50,571.3 0 2025-07-04 07:04:55 SMTP service unavailable: "421 Client host [117.88.100.83] blocked using internal list; Too many unknown addresses, probable dictionary harvest attack. Expected removal in 3.3 days" received from in2-smtp.messagingengine.com (202.12.124.217) while connected from server1.fedex-hk.cn (10.0.0.142) to in2-smtp.messagingengine.com (202.12.124.217)
myway.com 1,937 48,037.7 0 2025-07-04 23:24:45 Timed out while connecting from server1.fedex-hk.cn (10.0.0.142) to myway.com (151.101.78.114)
fastmail.fm 1,855 46,007.8 0 2025-07-04 23:26:14 SMTP service unavailable: "421 Client host [117.88.100.83] blocked using internal list; Too many unknown addresses, probable dictionary harvest attack. Expected removal in 2.7 days" received from in2-smtp.messagingengine.com (202.12.124.216) while connected from server1.fedex-hk.cn (10.0.0.142) to in2-smtp.messagingengine.com (202.12.124.216)
fastmail.es 1,797 44,569.2 0 2025-07-04 23:26:34 SMTP service unavailable: "421 Client host [117.88.100.83] blocked using internal list; Too many unknown addresses, probable dictionary harvest attack. Expected removal in 2.7 days" received from in2-smtp.messagingengine.com (202.12.124.216) while connected from server1.fedex-hk.cn (10.0.0.142) to in2-smtp.messagingengine.com (202.12.124.216)
999.com.cn 1,184 29,367.6 0 2025-07-04 20:07:32 Timed out while connecting from server1.fedex-hk.cn (10.0.0.142) to xcrmx1.crc.com.cn (218.13.52.211)
xinhuanet.com 355 8,805.8 4 2025-07-04 23:32:43 Timed out while connecting from server1.fedex-hk.cn (10.0.0.142) to xinhuanet.com (202.108.119.193)
rediffmail.com 193 4,788.2 0 2025-07-04 20:41:57 Timed out while connecting from server1.fedex-hk.cn (10.0.0.142) to mx.rediffmail.rediff.akadns.net (202.137.234.30)
mail.china.com 180 4,465.3 0 2025-07-04 20:48:11 Connection attempt failed, status = ECONNREFUSED while connecting from server1.fedex-hk.cn (10.0.0.142) to mail.china.com (117.91.185.44)
vip.sohu.net 176 4,365.7 0 2025-07-04 23:24:45 Timed out while connecting from server1.fedex-hk.cn (10.0.0.142) to mx.mail.sohu.net (116.130.217.80)
globalsources.com 168 4,167.9 0 2025-07-04 20:17:43 SMTP service unavailable: "450 Requested action aborted [7.1] 94402, please visit https://knowledge.broadcom.com/external/article?legacyId=TECH246726 for more details about this error message." received from cluster6.us.messagelabs.com (67.219.250.213) while connected from server1.fedex-hk.cn (10.0.0.142) to cluster6.us.messagelabs.com (67.219.250.213)

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