#greylisting — Public Fediverse posts

Returning readers will remember my "Eighteen years of greytrapping" piece (https://nxdomain.no/~peter/eighteen_years_of_greytrapping.html or tracked https://bsdly.blogspot.com/2025/08/eighteen-years-of-greytrapping-is.html, and may also remember that it has numbers and graphs.

It's now been more like 19 years of the activity, and the numbers and graphs are refreshed as of end of July.

#spam #antispam #spamd #openbsd #greylisting #greytrapping #security #cybercrime #cybersecurity #smtp #email

I'm learning all kinds of things about email greylisting...

#email #greylisting

Repost for the Sunday crowd:

Migrating mail servers from exim to OpenSMTPD (smtpd) is fun and useful https://www.undeadly.org/cgi?action=article;sid=20260516064650 #openbsd #opensmtpd #smtpd #exim #email #smtp #mail #spam #antispam #greylisting #greytrapping #mailmigration

OpenSMTPD Is The Mail Server For The Future https://nxdomain.no/~peter/time_for_opensmtpd.html Migrating to OpenSMTPD from exim on OpenBSD was joyfully painless and smooth. #openbsd #opensmtpd #email #smtpd #rspamd #spam #antispam #greylisting #greytrapping #mailserver

hm. this thing seems to be popping up again and again https://news.ycombinator.com/item?id=47636937 #greytrapping #email #runyourownmailserver #spam #spamd #greylisting #antispam

Friends, is this https://nxdomain.no/~peter/20260224_smtp_blast_to_imaginary_friends.txt what a successful campaign looks like?

(also see https://nxdomain.no/~peter/eighteen_years_of_greytrapping.html or for that matter https://nostarch.com/book-of-pf-4e) @nostarch #greyptrapping #spam #spamd #pf #packetfilter #greylisting #email #cybercrime #marketing #scams

"The Rest Is Trash"

We are now halfway through the nineteenth year of greytrapping, still tracking and collecting from the wealth of imbecility out there

https://nxdomain.no/~peter/the_rest_is_trash.html (tracked https://bsdly.blogspot.com/2026/02/the-rest-is-trash.html) #spamd #greytrapping #greylisting #openbsd #freebsd #spam #antispam #cybercrime

Reprising my Sunday, Feb 1st post for the midweek crowd:

The Rest Is Trash https://nxdomain.no/~peter/the_rest_is_trash.html (tracked https://bsdly.blogspot.com/2026/02/the-rest-is-trash.html) following up on #greytrapping, updating the 18 years piece https://nxdomain.no/~peter/eighteen_years_of_greytrapping.html #openbsd #spamd #greytrappng #greylisting #antispam #cybercrime #networking #spam

The latest "Lazy reading" by Dragonfly Digest @dragonflydigest https://www.dragonflydigest.com/ has "Eighteen years of Greytrapping" https://nxdomain.no/~peter/eighteen_years_of_greytrapping.html featured. Later this year it will be nineteen years :) (and updates will come) #spamd #spam #openbsd #antispam #greytrapping #greylisting #cybercrime

A Major Mail Provider Demonstrate They Likely Do Not Understand Mail At All https://nxdomain.no/~peter/they_do_not_understand_mail_at_all.html (tracked https://bsdly.blogspot.com/2026/01/a-major-mail-provider-demonstrate-they.html)

#greytrapping #spam, #antispam #greylisting #blocklist, #openbsd #freebsd #smtp #email #SMTP, #contentfiltering #SPF #DMARC #security #networking @nostarch

Heh. Looks like the tracked version of Why 451 is Good for You - Greylisting Perspectives From the Early Noughties https://nxdomain.no/~peter/why_451_is_good.html (tracked https://bsdly.blogspot.com/2025/12/why-451-is-good-for-you-greylisting.html) hit hackernews: https://news.ycombinator.com/item?id=46414653

No, I willl not respond to those comments either :D

#greylisting #greytrapping #spam #spamtrapping #antispam #spamd #openbsd #smtp

Why 451 Is Good for You – Greylisting Perspectives from the Early Noughties

https://bsdly.blogspot.com/2025/12/why-451-is-good-for-you-greylisting.html

#HackerNews #Why451 #IsGoodForYou #Greylisting #EarlyNoughties #TechInsights

Why 451 is Good for You - Greylisting Perspectives From the Early Noughties https://nxdomain.no/~peter/why_451_is_good.html (tracked https://bsdly.blogspot.com/2025/12/why-451-is-good-for-you-greylisting.html) @nostarch #greytrapping #greylisting #smtp #email #spam #antispam #bookofpf

Wer E-Mail-Adressen wie 0102019b4a823bb4-f9e9c5cc-a44d-4f44-9d9a-57a9365ff732-000000@eu-west-1.amazonses.com als Absender-Adresse für den Versand von 2FA-Codes nutzt, ist offenkundig ein Fan von #Spam.

#Greylisting

Greylisting is so annoying when you are just testing a mail forwarding -> bouncing -> where might my mail sent to - setup :smile:

#mailserver #greylisting

It's heartwarming to a greying geek that a 5000+ words retrospective on greytrapping is turning out to be popular - https://nxdomain.no/~peter/eighteen_years_of_greytrapping.html (tracked https://bsdly.blogspot.com/2025/08/eighteen-years-of-greytrapping-is.html)

#greytrapping #spam #antispam #greylisting #blocklist #openbsd #freebsd #smtp #email #ssh #passwords #passwordguessing #pop3 #security #networking #cybercrime

It's now been a week since my population of spamtraps rolled past the number of inhabitants in my home country of Norway. Here is the retrospective:

Eighteen Years of Greytrapping - Is the Weirdness Finally Paying Off? https://nxdomain.no/~peter/eighteen_years_of_greytrapping.html (tracked https://bsdly.blogspot.com/2025/08/eighteen-years-of-greytrapping-is.html)

#greytrapping #spam #antispam #greylisting #blocklist #openbsd #freebsd #smtp #email #ssh #passwords #passwordguessing #pop3 #security #networking #cybercrime @nostarch

Friends, it finally happened. On August 7th, 2025, the number of spamtraps intended to fool spammers rolled past the number of inhabitants in my home country of Norway. It's time for a retrospective.

Eighteen Years of Greytrapping - Is the Weirdness Finally Paying Off? https://nxdomain.no/~peter/eighteen_years_of_greytrapping.html (tracked https://bsdly.blogspot.com/2025/08/eighteen-years-of-greytrapping-is.html)

#greytrapping #spam #antispam #greylisting #blocklist #openbsd #freebsd #smtp #email #ssh #passwords #passwordguessing #pop3 #security #networking #cybercrime

[Again for those on the other side of the pond] -

Friends, it finally happened. On August 7th, 2025, the number of spamtraps rolled past the number of people in my home country. It's time for a retrospective.

Eighteen Years of Greytrapping - Is the Weirdness Finally Paying Off? https://nxdomain.no/~peter/eighteen_years_of_greytrapping.html (tracked https://bsdly.blogspot.com/2025/08/eighteen-years-of-greytrapping-is.html)

#greytrapping #spam #antispam #greylisting #blocklist #openbsd #freebsd #smtp #email #ssh #passwords #passwordguessing #pop3 #security #networking #cybercrime

Friends, it finally happened. On August 7th, 2025, the number of spamtraps intended to woo the unwary spammer rolled past the number of inhabitants in my home country of Norway. It's time for a retrospective.

Eighteen Years of Greytrapping - Is the Weirdness Finally Paying Off? https://nxdomain.no/~peter/eighteen_years_of_greytrapping.html (tracked https://bsdly.blogspot.com/2025/08/eighteen-years-of-greytrapping-is.html)

#greytrapping #spam #antispam #greylisting #blocklist #openbsd #freebsd #smtp #email #ssh #passwords #passwordguessing #pop3 #security #networking #cybercrime

Eighteen Years of Greytrapping - Is the Weirdness Finally Paying Off? https://nxdomain.no/~peter/eighteen_years_of_greytrapping.html (tracked https://bsdly.blogspot.com/2025/08/eighteen-years-of-greytrapping-is.html)

Friends, it finally happened. On August 7th, 2025, the number of spamtraps intended to woo the unwary spammer rolled past the number of inhabitants in my home country of Norway.

It's time for a retrospective.

#greytrapping #spam #antispam #greylisting #blocklist #openbsd #freebsd #smtp #email #ssh #passwords #passwordguessing #pop3 #security #networking #cybercrime

Eighteen Years of Greytrapping - Is the Weirdness Finally Paying Off? https://nxdomain.no/~peter/eighteen_years_of_greytrapping.html (tracked https://bsdly.blogspot.com/2025/08/eighteen-years-of-greytrapping-is.html)

With the imaginary friends, also known as spamtraps, now more numerous than the inhabitants of their virtual landlord's home country, a greytrapping retrospective is in order.

#greytrapping #spam #antispam #greylisting #blocklist #openbsd #freebsd #smtp #email #ssh #passwords #passwordguessing #pop3 #security #networking #cybercrime

Following up on previous, the LinkedIn discussion revealed that there are people who have not heard about greylisting.

So here is my 2012 piece with updates, "In The Name Of Sane Email: Setting Up OpenBSD's spamd(8) With Secondary MXes In Play - A Full Recipe" https://nxdomain.no/~peter/in_the_name_of_sane_email.html

#spamd #antispam #spamd.conf #OpenBSD #blocklists #blacklists #greytrapping #greylisting #spam

@stalwartlabs first of all - I really like Stalwart - it's really well done and I haven't had any problems so far - thanks for that!
I was just wondering, is there a way to greylist mails above a certain spam score instead of all?
#SelfHosting #mailserver #spam #greylisting

Companies: Fix your fucking #EMail #servers so they deal with #greylisting ***Correctly***.

My server is set to accept after 30 seconds, soooo why am I waiting two hours for an EMail (with a code that expires after ten minutes, naturally)? Because the config is wrong.

I was reminded that the old "Effective Spam and Malware Countermeasures - Network Noise Reduction Using Free Tools" https://nxdomain.no/~peter/effective_spam_and_malware_countermeasures.html (a somewhat overweight article/blogpost) might still be worth your time if you are that kind of person #openbsd #spamd #antispam #greylisting #greytrapping #cybercrime #freebsd #freesoftware #libresoftware (if nothing else for the references to other items of interest)

One-time-passphrases with a lifetime of six minutes, sent from random sender address.

Could it be that you @mozilla people actually totally endorse #spam or why do setup such a policy that has absolutely no chance to work bypass #greylisting filters?

#mozilla