#Postfix 3.10.2 has been released (#SMTP / #MailServer / #MTA) http://postfix.org/
postfix.orgThe Postfix Home Page
Recent searches
Search options
#smtp
5 posts4 participants1 post today
𝚜𝚎𝚕𝚎𝚊 
I find it really sad that Trusteddomainproject (authors of OpenDMARC) is basically dead
I interpret the following
Apr 20 18:38:09 skapet spamd[52874]: (GREY) 117.53.153.22: <> -> <spfilter-2.sel01.mschosting.com-1745167076-testing@ehtrib.org>
As a sign there are still, er, individuals out there who think SMTP callbacks were a good idea.
Please have them read "Twenty-plus years on, SMTP callbacks are still pointless and need to die" (2017) https://nxdomain.no/~peter/twenty-plus_years_on_smtp_callbacks_are_still_pointless.html
nxdomain.noTwenty-plus years on, SMTP callbacks are still pointless and need to die
#curl 8.13.0 has been released (#libcurl / #Haxx / #DICT / #FILE / #FTP / #FTPS / #Gopher / #HTTP / #HTTPS / #IMAP / #IMAPS / #LDAP / #LDAPS / #MQTT / #POP3 / #POP3S / #RTMP / #RTMPS / #RTSP / #SCP / #SFTP / #SMB / #SMBS / #SMTP / #SMTPS / #Telnet / #TFTP / #WebSocket / #SOCKS4 / #SOCKS5 / #SCRAM / #TLS / #HTTP2 / #HTTP3) https://curl.se/
curl.securl
Replied in thread
I know what #SMTP stands for since a loong time. However, for some reason I always hesitate between STMP and SMTP when writing/saying it out loud. Like, I have to say the whole name in my head to know which one is the correct one...
please tell me I'm not the only one 
Continued thread
System Administration
Week 8, HTTPS & TLS
After discussing HTTP in the previous week and seeing how we used STARTTLS in the context of #SMTP, we are now quickly reviewing HTTPS, TLS, and the WebPKI. While we don't have a video segment for this, here are slides, including this handy diagram illustrating the CSR process:
MailChannels Acquires SMTP Protocol from IETF for $50 Million
https://www.linkedin.com/pulse/mailchannels-acquires-smtp-protocol-from-ietf-50-million-hbasc/
www.linkedin.comMailChannels Acquires SMTP Protocol from IETF for $50 MillionVancouver, BC — April 1, 2025 — In a shocking move that has rocked the email world, MailChannels announced today that it has acquired the Simple Mail Transfer Protocol (SMTP) from the Internet Engineering Task Force (IETF) for a cool $50 million. The acquisition grants MailChannels exclusive ownersh
Continued thread
System Administration
Week 8, The Simple Mail Transfer Protocol
Shared by a student of mine: Email vs Capitalism, or, Why We Can't Have Nice Things, a talk given by Dylan Beattie at NDC Oslo 2023. Covers a lot of our materials and adds some additional context.
youtu.be- YouTubeEnjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.
Continued thread
System Administration
Week 8, The Simple Mail Transfer Protocol, Part III
In this video, we look at ways to combat Spam. In the process, we learn about email headers, the Sender Policy Framework (#SPF), DomainKeys Identified Mail (#DKIM), and Domain-based Message Authentication, Reporting and Conformance (#DMARC). #SMTP doesn't seem quite so simple any more...
youtu.be- YouTubeEnjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.
Continued thread
System Administration
Week 8, The Simple Mail Transfer Protocol, Part II
In this video, we observe the incoming mail on our MTA, look at how STARTTLS can help protect information in transit, how MTA-STS can help defeat a MitM performing a STARTTLS-stripping attack, and how DANE can be used to verify the authenticity of the mail server's certificate.
youtu.be- YouTubeEnjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.
Didn't one of y'all write an ebook on hosting your own mail server? Or have a blog series about it or something? #hostyourown #smtp
Back in the dim and distant times, when people who attached devices to the internet had some sort of a clue, if you were going to send email by #SMTP, it was vitally important for the sending network interface to have a matching reverse and forward DNS, since that was a very basic spam filter. At least you had some clue whose machines were sending the message, even if the message itself was junk.
Nowadays, it seems that even big 'cloud' systems like #microsoft365 don't have reverse DNS. #email
A #SMTP server that protects you while handling huge amount of messages : Chainmail
My day started with welcoming agmKHzyPT1wK_sLBlBs0KzXZt_18274@skapet.bsdly.net to the imaginary friends population at https://nxdomain.no/~peter/traplist.shtml, this one generated by whatever runs the service check@taknc.com, hosted in AS134963 (Alibaba) address space.
How is your day going?
nxdomain.nobsdly.net - A traplist collected by Peter Hansteen
Hey #Sysadmin|s of the fediverse, I want to ask you for some recommendation, I want to get rid of my old and molden mailsystem.
I just need Mail for a couple accounts and domains for myself and some friends. Would be nice to have a WebGUI, but is not a must.
Continued thread
System Administration
Week 8, The Simple Mail Transfer Protocol
In this video, we begin our discussion of E-Mail by looking at the components of the larger mail system (the Mail User Agent, Mail Transfer Agent, Mail Delivery Agent, Access Agent); we observe the packets involved in a simple #SMTP exchange and track an email from one system to the other, both through the logs and on the wire, before we then learn to speak SMTP via telnet(1).
youtu.be- YouTubeEnjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.
My self-hosted API #CuckooPost for sending mails without storing SMTP credentials in my projects has got an update.
Thank you @risottobias for your input on the project. I implemented some of your ideas, and now there is a mail log and recipient whitelist in the admin panel.
Find out more about CuckooPost on GitHub, or try it and host it yourself.