PowerMTA™ 4.5r1 
mta.streamad.in 
Home Status Queues Domains Virtual MTAs Jobs Logs

Help
Domain Detail
nameymail.com
recipients61
kbytes1,505.3
active connections0
Queues
vmta recipients kbytes connections paused mode % recipients
pmta188-121 19 411.3 0 no normal 0%
pmta213-146 11 273.0 0 no normal 0%
pmta51-206 7 185.4 0 no normal 0%
pmta51-167 6 158.9 0 no normal 0%
pmta5-150 5 132.4 0 no normal 0%
pmta51-51 4 105.9 0 no normal 0%
pmta137-88 3 79.4 0 no normal 0%
pmta51-55 3 79.4 0 no normal 0%
pmta54-159 3 79.4 0 no normal 0%
pmta178-143 0 0.0 0 no normal 0%
Last Errors
vmtatimeerror
pmta178-143 2026-04-04 18:05:13 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 178.32.206.143 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from jupiter.streamad.in (178.32.206.143) to mta6.am0.yahoodns.net (67.195.228.109)
pmta178-143 2026-04-04 18:04:50 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 178.32.206.143 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from jupiter.streamad.in (178.32.206.143) to mta5.am0.yahoodns.net (98.136.96.74)
pmta137-88 2026-04-04 18:04:08 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 137.74.217.88 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from uranus.streamad.in (137.74.217.88) to mta7.am0.yahoodns.net (67.195.228.109)
pmta178-143 2026-04-04 18:04:03 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 178.32.206.143 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from jupiter.streamad.in (178.32.206.143) to mta6.am0.yahoodns.net (67.195.228.106)
pmta137-88 2026-04-04 18:04:02 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 137.74.217.88 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from uranus.streamad.in (137.74.217.88) to mta5.am0.yahoodns.net (67.195.204.72)
pmta137-88 2026-04-04 18:03:56 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 137.74.217.88 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from uranus.streamad.in (137.74.217.88) to mta5.am0.yahoodns.net (67.195.204.72)
pmta51-55 2026-04-04 18:03:55 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 51.68.102.55 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from venus.streamad.in (51.68.102.55) to mta7.am0.yahoodns.net (67.195.228.109)
pmta51-55 2026-04-04 18:03:49 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 51.68.102.55 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from venus.streamad.in (51.68.102.55) to mta5.am0.yahoodns.net (67.195.204.72)
pmta178-143 2026-04-04 18:03:49 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 178.32.206.143 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from jupiter.streamad.in (178.32.206.143) to mta6.am0.yahoodns.net (67.195.228.106)
pmta51-167 2026-04-04 18:03:48 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 51.68.59.167 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from neptune.streamad.in (51.68.59.167) to mta6.am0.yahoodns.net (67.195.228.106)
pmta5-150 2026-04-04 18:03:47 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 5.135.250.150 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from mercury.streamad.in (5.135.250.150) to mta6.am0.yahoodns.net (67.195.228.106)
pmta51-167 2026-04-04 18:03:46 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 51.68.59.167 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from neptune.streamad.in (51.68.59.167) to mta6.am0.yahoodns.net (67.195.228.106)
pmta137-88 2026-04-04 18:03:45 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 137.74.217.88 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from uranus.streamad.in (137.74.217.88) to mta5.am0.yahoodns.net (67.195.204.72)
pmta51-206 2026-04-04 18:03:44 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 51.254.4.206 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from pluto.streamad.in (51.254.4.206) to mta6.am0.yahoodns.net (67.195.228.106)
pmta51-206 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 51.254.4.206 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from pluto.streamad.in (51.254.4.206) to mta6.am0.yahoodns.net (67.195.228.106)
pmta51-51 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)
pmta178-143 2026-04-04 18:03:40 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 178.32.206.143 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from jupiter.streamad.in (178.32.206.143) to mta5.am0.yahoodns.net (67.195.204.72)
pmta137-88 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 137.74.217.88 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from uranus.streamad.in (137.74.217.88) to mta6.am0.yahoodns.net (67.195.228.106)
pmta54-159 2026-04-04 18:03:37 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 54.36.75.159 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from ceres.streamad.in (54.36.75.159) to mta5.am0.yahoodns.net (67.195.204.72)
pmta51-167 2026-04-04 18:03:36 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 51.68.59.167 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from neptune.streamad.in (51.68.59.167) to mta7.am0.yahoodns.net (67.195.228.109)
pmta137-88 2026-04-04 18:03:35 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 137.74.217.88 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from uranus.streamad.in (137.74.217.88) to mta6.am0.yahoodns.net (67.195.228.106)
pmta51-167 2026-04-04 18:03:33 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 51.68.59.167 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from neptune.streamad.in (51.68.59.167) to mta5.am0.yahoodns.net (67.195.204.72)
pmta5-150 2026-04-04 18:03:32 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 5.135.250.150 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from mercury.streamad.in (5.135.250.150) to mta6.am0.yahoodns.net (67.195.204.79)
pmta51-51 2026-04-04 18:03:32 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 (67.195.204.74)
pmta51-167 2026-04-04 18:03:27 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 51.68.59.167 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from neptune.streamad.in (51.68.59.167) to mta5.am0.yahoodns.net (67.195.204.72)
pmta51-206 2026-04-04 18:03:26 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 51.254.4.206 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from pluto.streamad.in (51.254.4.206) to mta6.am0.yahoodns.net (67.195.204.79)
pmta51-55 2026-04-04 18:03:26 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 51.68.102.55 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from venus.streamad.in (51.68.102.55) to mta7.am0.yahoodns.net (67.195.204.74)
pmta51-55 2026-04-04 18:03:24 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 51.68.102.55 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from venus.streamad.in (51.68.102.55) to mta5.am0.yahoodns.net (67.195.204.72)
pmta5-150 2026-04-04 18:03:22 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 5.135.250.150 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from mercury.streamad.in (5.135.250.150) to mta6.am0.yahoodns.net (67.195.204.79)
pmta51-51 2026-04-04 18:03:21 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 (67.195.204.74)
pmta178-143 2026-04-04 18:03:21 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 178.32.206.143 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from jupiter.streamad.in (178.32.206.143) to mta5.am0.yahoodns.net (67.195.204.72)
pmta51-167 2026-04-04 18:03:17 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 51.68.59.167 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from neptune.streamad.in (51.68.59.167) to mta6.am0.yahoodns.net (67.195.204.79)
pmta5-150 2026-04-04 18:03:16 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 5.135.250.150 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from mercury.streamad.in (5.135.250.150) to mta5.am0.yahoodns.net (67.195.204.72)
pmta51-206 2026-04-04 18:03:09 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 51.254.4.206 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from pluto.streamad.in (51.254.4.206) to mta6.am0.yahoodns.net (67.195.204.79)
pmta137-88 2026-04-04 18:03:07 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 137.74.217.88 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from uranus.streamad.in (137.74.217.88) to mta5.am0.yahoodns.net (67.195.204.72)
pmta51-55 2026-04-04 18:03:01 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 51.68.102.55 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from venus.streamad.in (51.68.102.55) to mta7.am0.yahoodns.net (67.195.204.74)
pmta51-167 2026-04-04 18:02:55 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 51.68.59.167 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from neptune.streamad.in (51.68.59.167) to mta6.am0.yahoodns.net (67.195.204.79)
pmta5-150 2026-04-04 18:00:53 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 5.135.250.150 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from mercury.streamad.in (5.135.250.150) to mta6.am0.yahoodns.net (67.195.204.79)
pmta51-206 2026-04-04 18:00:48 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 51.254.4.206 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from pluto.streamad.in (51.254.4.206) to mta6.am0.yahoodns.net (67.195.204.79)
pmta51-55 2026-04-04 18:00:34 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 51.68.102.55 = FAILURE. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for more information." while connected from venus.streamad.in (51.68.102.55) to mta6.am0.yahoodns.net (67.195.204.79)
pmta188-121 2026-04-04 17:08:07 Error: "421 4.7.0 [TSS04] Messages from 188.165.10.121 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes" while connected from saturn.streamad.in (188.165.10.121) to mta7.am0.yahoodns.net (67.195.204.73)
pmta188-121 2026-04-04 17:07:07 message rate limit reached (based on queue's max-msg-rate in configuration) (2x)
pmta188-121 2026-04-04 17:07:06 message rate limit reached (based on queue's max-msg-rate in configuration) (3x)
pmta188-121 2026-04-04 17:07:06 Error: "421 4.7.0 [TSS04] Messages from 188.165.10.121 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes" while connected from saturn.streamad.in (188.165.10.121) to mta6.am0.yahoodns.net (67.195.228.110)
pmta188-121 2026-04-04 17:07:06 Error: "421 4.7.0 [TSS04] Messages from 188.165.10.121 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes" while connected from saturn.streamad.in (188.165.10.121) to mta5.am0.yahoodns.net (67.195.228.94)
pmta188-121 2026-04-04 17:07:06 Error: "421 4.7.0 [TSS04] Messages from 188.165.10.121 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes" while connected from saturn.streamad.in (188.165.10.121) to mta6.am0.yahoodns.net (67.195.228.110)
pmta188-121 2026-04-04 17:07:06 Error: "421 4.7.0 [TSS04] Messages from 188.165.10.121 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes" while connected from saturn.streamad.in (188.165.10.121) to mta7.am0.yahoodns.net (67.195.204.74) (2x)
pmta213-146 2026-04-04 16:34:11 Error: "421 4.7.0 [TSS04] Messages from 213.32.59.146 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes" while connected from sun.streamad.in (213.32.59.146) to mta6.am0.yahoodns.net (67.195.204.73)
pmta188-121 2026-04-04 13:07:05 Error: "421 4.7.0 [TSS04] Messages from 188.165.10.121 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes" while connected from saturn.streamad.in (188.165.10.121) to mta6.am0.yahoodns.net (67.195.204.74)
pmta188-121 2026-04-04 13:07:04 Error: "421 4.7.0 [TSS04] Messages from 188.165.10.121 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes" while connected from saturn.streamad.in (188.165.10.121) to mta5.am0.yahoodns.net (67.195.204.77)
pmta188-121 2026-04-04 13:07:04 Error: "421 4.7.0 [TSS04] Messages from 188.165.10.121 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes" while connected from saturn.streamad.in (188.165.10.121) to mta6.am0.yahoodns.net (67.195.204.74)
pmta213-146 2026-04-04 12:34:10 Error: "421 4.7.0 [TSS04] Messages from 213.32.59.146 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes" while connected from sun.streamad.in (213.32.59.146) to mta6.am0.yahoodns.net (98.136.96.75)
pmta213-146 2026-04-04 08:34:09 Error: "421 4.7.0 [TSS04] Messages from 213.32.59.146 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes" while connected from sun.streamad.in (213.32.59.146) to mta6.am0.yahoodns.net (98.136.96.76)