Another huge crop of balug-announce subscriptions got delivery turned off. 1. These equate to "no such user" or "no such host/domain", and have now been manually removed (by me) from the roster: rich@olliancegroup.com retry timeout exceeded mark@shelfspace.com retry timeout exceeded mcgovern@my-website.com retry timeout exceeded justin@turbolinux.com retry timeout exceeded crux@best.com retry timeout exceeded wagnerc@tsipr.com host mx1.botb8.com [66.240.243.38] retry timeout exceeded m@artgrin.com retry timeout exceeded heidi.totten@phase3recruiting.com retry timeout exceeded rmd@wco.com retry timeout exceeded jayvalenta@directvinternet.com retry timeout exceeded aputnam@theforbingroup.com retry timeout exceeded dmarti@electriclichen.com host electriclichen.com [183.181.98.251] SMTP error from remote mail server after RCPT TO:<dmarti@electriclichen.com>: 454 4.7.1 <dmarti@electriclichen.com>: Relay access denied: retry timeout exceeded epearce@amberpoint.com retry timeout exceeded jcarrington@penguincomputing.com host aspmx.l.google.com [2607:f8b0:4023:c0b::1b] SMTP error from remote mail server after RCPT TO:<jcarrington@penguincomputing.com>: 550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient's email address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser y13-20020a056a00190d00b005363fa9e126si13788614pfi.358 - gsmtp javier@cozybit.com host aspmx.l.google.com [2607:f8b0:4023:c0b::1b] SMTP error from remote mail server after RCPT TO:<javier@cozybit.com>: 550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient's email address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser b30-20020a631b1e000000b00461f71a53e1si12403363pgb.505 - gsmtp gordo@codemonks.com host ASPMX.L.GOOGLE.com [142.250.141.27] SMTP error from remote mail server after RCPT TO:<gordo@codemonks.com>: 550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient's email address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser p1-20020a63c141000000b00429f2cb4a47si12634633pgi.491 - gsmtp kbarry@packard.com host east.smtp.exch021.serverdata.net [162.216.194.251] SMTP error from remote mail server after RCPT TO:<kbarry@packard.com>: 550 5.1.1 <kbarry@packard.com>: Recipient address rejected: User unknown in relay recipient table jmaydeck@at-tech.com host mxa-0026fd02.gslb.pphosted.com [205.220.161.87] SMTP error from remote mail server after RCPT TO:<jmaydeck@at-tech.com>: 550 5.1.1 User Unknown mtrinh@linuxcare.com host aspmx.l.google.com [142.250.141.27] SMTP error from remote mail server after RCPT TO:<mtrinh@linuxcare.com>: 550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient's email address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser nn10-20020a17090b38ca00b0020d9f618c4asi18134018pjb.17 - gsmtp sarah@cloudmade.com host aspmx3.googlemail.com [2607:f8b0:4001:c56::1b] SMTP error from remote mail server after RCPT TO:<sarah@cloudmade.com>: 550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient's email address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser h2-20020a92c262000000b002f8a3b1e983si11271540ild.20 - gsmtp jim@systemateka.com Unrouteable address qkstart@ix.netcom.com host mx04.oxsus-vadesecure.net [147.135.98.120] SMTP error from remote mail server after RCPT TO:<qkstart@ix.netcom.com>: 550 5.5.1 Recipient rejected - ELNK001_403 - https://postmaster-earthlink.vadesecure.com/inbound_error_codes/#_403 kathryntate@aaahawk.com host mx04.oxsus-vadesecure.net [147.135.98.120] SMTP error from remote mail server after RCPT TO:<kathryntate@aaahawk.com>: 550 5.5.1 Recipient rejected - ELNK001_403 - https://postmaster-earthlink.vadesecure.com/inbound_error_codes/#_403 2. These appear to all be one of the known DNSBL listings. Michael, you will need to investigate and remedy those listings. I have _not_ re-enabled balug-announce delivery to these subscribers. mike1martin654@hotmail.com host hotmail-com.olc.protection.outlook.com [104.47.0.33] SMTP error from remote mail server after RCPT TO:<mike1martin654@hotmail.com>: 550 5.5.0 Requested action not taken: mailbox unavailable (S2017062302). [HE1EUR01FT071.eop-EUR01.prod.protection.outlook.com] marie_burnett@hotmail.com host hotmail-com.olc.protection.outlook.com [104.47.0.33] SMTP error from remote mail server after RCPT TO:<marie_burnett@hotmail.com>: 550 5.5.0 Requested action not taken: mailbox unavailable (S2017062302). jprewitt@macromedia.com host macromedia-com.mail.protection.outlook.com [104.47.73.10] SMTP error from remote mail server after RCPT TO:<jprewitt@macromedia.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [DM6NAM04FT012.eop-NAM04.prod.protection.outlook.com] 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]:44427 is in an RBL: http://www.barracudanetworks.com/reputation/?pr=1&ip=96.86.170.229" pozar@lns.com host lns.com [107.161.208.1] SMTP error from remote mail server after RCPT TO:<pozar@lns.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 rainer.brendle@sap.com host sap-com.mail.protection.outlook.com [104.47.51.138] SMTP error from remote mail server after RCPT TO:<rainer.brendle@sap.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [DBAEUR03FT061.eop-EUR03.prod.protection.outlook.com] juergen.schmerder@sap.com host sap-com.mail.protection.outlook.com [104.47.51.138] SMTP error from remote mail server after RCPTTO:<juergen.schmerder@sap.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [DBAEUR03FT061.eop-EUR03.prod.protection.outlook.com] 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) [BN8NAM12FT025.eop-nam12.prod.protection.outlook.com] drfreud@tangerinelab.com host tangerinelab-com.mail.protection.outlook.com [104.47.73.10] SMTP error from remote mail server after RCPT TO:<drfreud@tangerinelab.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [DM6NAM04FT013.eop-NAM04.prod.protection.outlook.com] warren@delsci.com host delsci-com.mail.protection.outlook.com [104.47.13.36] SMTP error from remote mail server after RCPT TO:<warren@delsci.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [HE1EUR04FT033.eop-eur04.prod.protection.outlook.com] balug-digest-local@jupiter.com host jupiter-com.mail.protection.outlook.com [104.47.56.138] SMTP error from remote mail server after RCPT TO:<balug-digest-local@jupiter.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [CO1NAM11FT073.eop-nam11.prod.protection.outlook.com] darynr@facsware.com host facsware-com.mail.protection.outlook.com [104.47.57.110] SMTP error from remote mail server after RCPT TO:<darynr@facsware.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [SN1NAM02FT0036.eop-nam02.prod.protection.outlook.com] zen@pengaru.com host mail.pengaru.com [66.240.222.126] SMTP error from remote mail server after RCPT TO:<zen@pengaru.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 mark@eversmall.com host mx10.mailspamprotection.com [185.56.84.27] 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 [104.47.51.110] SMTP error from remote mail server after RCPT TO:<seanl@cnet.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [BN1NAM02FT032.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. david@servepath.com host servepath-com.mail.protection.outlook.com [104.47.66.10] SMTP error from remote mail server after RCPT TO:<david@servepath.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [MW2NAM12FT033.eop-nam12.prod.protection.outlook.com] smclean@baynetworks.com host baynetworks-com.mail.protection.outlook.com [104.47.58.138] SMTP error from remote mail server after RCPT TO:<smclean@baynetworks.com>: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [BN8NAM11FT028.eop-nam11.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) [DBAEUR03FT052.eop-EUR03.prod.protection.outlook.com] 3. This last one was very peculiar, indeed. balug.sac65849@spamgourmet.com host gourmet7.spamgourmet.com [216.75.62.102] SMTP error from remote mail server after pipelined sending data block: 550-X-Host-Lookup-Failed: Reverse DNS lookup does not match for 96.86.170.229 550 (deferred) Because: $ dig -x 96.86.170.229 +short balug.org. $ WTF? Yes, I accept and approve of "SMTP host's IP must have a valid PTR", and that is normal as an antispam heuristic. However, no sane sysadmin requires an exact match between forward and reverse, otherwise people would not be able to handle multiple mail-sending domains on one IP, which is a normal and expected use-case. So, I have _also_ removed balug.sac65849@spamgourmet.com from the roster. That leaves 21 subscribers with delivery disabled (category 2) on account of DNSBL-driven refusals. Mailman will eventually unsub those, if the current situation persists.