PowerMTA™ 4.5r1 
mta.streamad.in 

Top 10 queues in virtual MTA "pmta51-51" by number of recipients

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Name #Rcpt KBytes #Conn Paused Mode Last Error
gmail.com/pmta51-51 487 10,120.7 0 no normal 2026-04-04 17:27:27 message rate limit reached (based on queue's max-msg-rate in configuration) (10x)
yahoo.com/pmta51-51 61 1,477.6 0 no normal 2026-04-04 15:26:26 message rate limit reached (based on queue's max-msg-rate in configuration) (2x)
hotmail.com/pmta51-51 35 927.1 0 no backoff 2026-04-04 18:03:48 message rate limit reached (based on queue's backoff-max-msg-rate in configuration)
yahoo.co.in/pmta51-51 35 918.1 0 no normal 2026-04-04 18:00:52 Error: "550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires all senders to authenticate with either SPF or DKIM. Authentication results: DKIM = FAILURE - SPF bcsonline.org.in with ip 51.68.67.51 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from planet.streamad.in (51.68.67.51) to mx-apac.mail.gm0.yahoodns.net (106.10.248.74)
yahoo.in/pmta51-51 16 423.8 0 no normal 2026-04-04 18:03:38 Error: "550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires all senders to authenticate with either SPF or DKIM. Authentication results: DKIM = FAILURE - SPF bcsonline.org.in with ip 51.68.67.51 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from planet.streamad.in (51.68.67.51) to mx-apac.mail.gm0.yahoodns.net (106.10.248.74)
live.com/pmta51-51 5 132.4 0 no backoff 2026-04-04 18:03:48 message rate limit reached (based on queue's backoff-max-msg-rate in configuration)
ymail.com/pmta51-51 4 105.9 0 no normal 2026-04-04 18:03:43 Error: "550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires all senders to authenticate with either SPF or DKIM. Authentication results: DKIM = FAILURE - SPF bcsonline.org.in with ip 51.68.67.51 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from planet.streamad.in (51.68.67.51) to mta7.am0.yahoodns.net (67.195.228.109)
outlook.com/pmta51-51 3 79.5 0 no backoff 2026-04-04 18:04:20 Error: "550 5.7.1 Unfortunately, messages from [51.68.67.51] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [Name=Protocol Filter Agent][AGT=PFA][MxId=11BD1EDF151BE8EE] [CO1PEPF000066EA.namprd05.prod.outlook.com 2026-04-04T12:34:20.202Z 08DE8F6F8E353F80]" while connected from planet.streamad.in (51.68.67.51) to outlook-com.olc.protection.outlook.com (52.101.42.17)
ablco.in/pmta51-51 1 26.5 0 no normal   
acm.co.in/pmta51-51 1 26.5 0 no backoff   

10 of 30 matching queues.

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