1. Disabling of subscriptions on account of rejections that in turn were on account of DNSBL listings. I have taken no action on these. mike1martin654@hotmail.com host hotmail-com.olc.protection.outlook.com [104.47.56.161] SMTP error from remote mail server after RCPT TO:<mike1martin654@hotmail.com>: 550 5.5.0 Requested action not taken: mailbox unavailable (S2017062302). [CO1NAM11FT067.eop-nam11.prod.protection.outlook.com] marie_burnett@hotmail.com host hotmail-com.olc.protection.outlook.com [104.47.56.161] SMTP error from remote mail server after RCPT TO:<marie_burnett@hotmail.com>: 550 5.5.0 Requested action not taken: mailbox unavailable (S2017062302). here@infochambers.com host infochambers.com [66.45.232.109] SMTP error from remote mail server after RCPT TO:<here@infochambers.com>: 550-"JunkMail rejected - balug.org (balug-sf-lug-v2.balug.org) 550 [96.86.170.229]:47905 is in an RBL: http://www.barracudanetworks.com/reputation/?pr=1&ip=96.86.170.229" david.thomas@novell.com host smtp.ext.microfocus.com [129.84.2.139] SMTP error from remote mail server after initial connection: 554 IP address 96.86.170.229 rejected [IP reputation fail] drfreud@tangerinelab.com host tangerinelab-com.mail.protection.outlook.com [104.47.73.138] SMTP error from remote mail server after RCPT TO:<drfreud@tangerinelab.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [MW2NAM04FT006.eop-NAM04.prod.protection.outlook.com] mark@eversmall.com host mx10.mailspamprotection.com [185.56.84.30] SMTP error from remote mail server after end of data: 550 The sending IP (96.86.170.229) is listed on https://spamrl.com/. Please resolve this and retry. daevid@daevid.com host daevid.com [216.160.113.113] SMTP error from remote mail server after RCPT TO:<daevid@daevid.com>: 554 5.7.1 Service unavailable; Client host [96.86.170.229] blocked using b.barracudacentral.org; http://www.barracudanetworks.com/reputation/?pr=1&ip=96.86.170.229 tj@tjack.com host mail.tjack.com [109.237.208.19] SMTP error from remote mail server after RCPT TO:<tj@tjack.com>: 550 Email blocked by b.barracudacentral.org (127.0.0.2) seanl@cnet.com host cnet-com.mail.protection.outlook.com [104.47.57.110] SMTP error from remote mail server after RCPT TO:<seanl@cnet.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281)[SN1NAM02FT0063.eop-nam02.prod.protection.outlook.com] luke@teyssier.com host mail.teyssier.com [64.26.60.153] SMTP error from remote mail server after end of data: 550 The sending IP (96.86.170.229) is listed on https://spamrl.com/. Please resolve this and retry. nikki@mindsource.com host mindsource-com.mail.protection.outlook.com [104.47.55.138] SMTP error from remote mail server after RCPT TO:<nikki@mindsource.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [BN8NAM12FT112.eop-nam12.prod.protection.outlook.com] david@servepath.com host servepath-com.mail.protection.outlook.com [104.47.55.138] SMTP error from remote mail server after RCPT TO:<david@servepath.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [BN8NAM12FT033.eop-nam12.prod.protection.outlook.com] smclean@baynetworks.com host baynetworks-com.mail.protection.outlook.com [104.47.56.138] SMTP error from remote mail server after RCPT TO:<smclean@baynetworks.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [CO1NAM11FT055.eop-nam11.prod.protection.outlook.com] juergen.schmerder@sap.com host sap-com.mail.protection.outlook.com [104.47.30.74] SMTP error from remote mail server after RCPT TO:<juergen.schmerder@sap.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [VI1EUR03FT011.eop-EUR03.prod.protection.outlook.com] mcneil@suse.com host suse-com.mail.protection.outlook.com [104.47.51.138] SMTP error from remote mail server after RCPT TO:<mcneil@suse.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281)[DBAEUR03FT023.eop-EUR03.prod.protection.outlook.com] <mgallagher@techtarget.com> (reason: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281)[BN7NAM10FT014.eop-nam10.prod.protection.outlook.com]) danmcc@metro.net host metro-net.mail.protection.outlook.com [104.47.64.110] SMTP error from remote mail server after RCPT TO:<danmcc@metro.net>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281)[BL0GCC02FT043.eop-gcc02.prod.protection.outlook.com] hso@nosneros.net host mail.tuplemovers.net [64.13.153.240] SMTP error from remote mail server after RCPT TO:<hso@nosneros.net>: 554 5.7.1 Service unavailable; Client host [96.86.170.229] blocked using b.barracudacentral.org; http://www.barracudanetworks.com/reputation/?pr=1&ip=96.86.170.229 mray01@ccsf.cc.ca.us host ns7.ccsf.cc.ca.us [147.144.1.250] SMTP error from remote mail server after RCPT TO:<mray01@ccsf.cc.ca.us>: 553 5.3.0 <mray01@ccsf.cc.ca.us>... Rejected by Barracuda Reputation Block List - see http://www.barracudacentral.org/rbl/listing-methodology 2. Delivery failed because user/mailbox no longer exists. I have removed these subscribers from balug-announce, manually. kno@jtan.com host mail-filter-1.jtan.com [184.105.182.180] SMTP error from remote mail server after pipelined end of data: 550-REJECTED - RCPT-VERIFY-FAIL kno@jtan.com 550 5.0.0 <kno@jtan.com>... no 550 such user dostrow@gentoo.org host mail.gentoo.org [2001:470:ea4a:1:5054:ff:fec7:86e4] SMTP error from remote mail server after RCPT TO:<dostrow@gentoo.org>: 550 5.1.1 <dostrow@gentoo.org>: Recipient address rejected: User unknown in local recipient table j0shw@comcast.net host mx2h1.comcast.net [2001:558:fd02:243f::3] SMTP error from remote mail server after RCPT TO:<j0shw@comcast.net>: 550 5.1.1 Not our Customer dmz@vortex4.net host fionna.vortex4.net [207.135.99.73] SMTP error from remote mail server after RCPT TO:<dmz@vortex4.net>: 550 5.1.1 <dmz@vortex4.net>: Recipient address rejected: User unknown in local recipient table dhull@digitaloverload.net host mail.digitaloverload.net [50.87.146.15] SMTP error from remote mail server after RCPT TO:<dhull@digitaloverload.net>: 550 No Such User Here hoggwf@earthlink.net host mx03.oxsus-vadesecure.net [51.81.232.218] SMTP error from remote mail server after RCPT TO:<hoggwf@earthlink.net>: 550 5.5.1 Recipient rejected - ELNK001_403 -https://postmaster-earthlink.vadesecure.com/inbound_error_codes/#_403 mrcaseyb@speakeasy.net host mx.speakeasy.net [64.29.145.41] SMTP error from remote mail server after RCPT TO:<mrcaseyb@speakeasy.net>: 550 5.1.1 <mrcaseyb@speakeasy.net>... User unknown sking@riverdeep.net host us-smtp-inbound-2.mimecast.com [205.139.110.221] SMTP error from remote mail server after RCPT TO:<sking@riverdeep.net>: 550 Invalid Recipient - https://community.mimecast.com/docs/DOC-1369#550[BpKaIpOwNX6j-hHKdCHGlQ.us160] awhite@wikimedia.org host mx1001.wikimedia.org [2620:0:861:3:208:80:154:76] SMTP error from remote mail server after RCPT TO:<awhite@wikimedia.org>: 550-Callout verification failed: 550-550-5.2.1 The email account that you tried to reach is disabled. Learn more 550-at 550-550 5.2.1 https://support.google.com/mail/?p=DisabledUser 550 fo6-20020ad45f06000000b004bb984ae488si6560292qvb.537 - gsmtp jbuck@welsh-buck.org Unrouteable address snatcher@arlington.com https://products.office.com/en-us/CMSImages/Office365Logo_Orange.png?version...] Your message to snatcher@arlington.com couldn't be delivered. snatcher wasn't found at arlington.com. balug-announce-bounc. . . Office 365 snatcher Action Required Recipient Unknown To address darynr@facsware.com Your message to darynr@facsware.com couldn't be delivered. darynr wasn't found at facsware.com. balug-announce-bounc. . . Office 365 darynr Action Required Recipient Unknown To address thompsonc@stancounty.com Your message to thompsonc@stancounty.com couldn't be delivered. thompsonc wasn't found at stancounty.com. balug-announce-bounc. . . Office 365 thompsonc Action Required Recipient Unknown To address rajesh.akula@unisys.com rajesh.akula@unisys.com<mailto:rajesh.akula@unisys.com> The email address you entered couldn't be found. Please check the recipient's +email address and try to resend the message. If the problem continues, please +contact your helpdesk. jstafford@techtarget.com [https://products.office.com/en-us/CMSImages/Office365Logo_Orange.png?version... +d100a9-0a8b-8e6a-88e1-ef488fee0470] Your message to jstafford@techtarget.com couldn't be delivered. jstafford wasn't found at techtarget.com. balug-announce-bounc. . . Office 365 jstafford Action Required Recipient Unknown To address jstone@sfsu.edu [https://products.office.com/en-us/CMSImages/Office365Logo_Orange.png?version... +d100a9-0a8b-8e6a-88e1-ef488fee0470] Your message to jstone@sfsu.edu couldn't be delivered. jstone wasn't found at sfsu.edu. balug-announce-bounc. . . Office 365 jstone Action Required Recipient Unknown To address 3. What the heck? I'm not sure I understand. my_balug@spamcrazy.org host mail.spamcrazy.org [34.210.110.113] SMTP error from remote mail server after RCPT TO:<my_balug@spamcrazy.org>: 550-DNSBL listed at sbl.spamhaus.org 550 Error: open resolver; https://www.spamhaus.org/returnc/pub/44.242.180.255 I really don't get it. I don't find a DNSBL listing for either the IPV4 or IPV6 or the FQDN, and the "Error: open resolver" doesn't make a lot of sense. On general suspicion, I've removed my_balug@spamcrazy.org from the subscriber roster.