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

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?

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.

Applying for a job, must be done via #email.
I try from a well known #SMTP (gmx), their Outlook (at the company I try to reach) answers me that it can't be delivered because of "access denied".
Then I try from my own domain/e-mail server , it now answers me that my IP is banned (why?????).
NO, I WON'T CREATE A GMAIL ADDRESS.

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.

#mail #smtp #sendmail #oss #foss #php #api #selfhosted

https://github.com/soulflyman/CuckooPost

Hi there. I'm self hosting my SMTP server for years, and I have 10/10 on https://www.mail-tester.com/

Recently, I've got 2 messages rejected by Apple server (on "@me.com" addresses), and today I've got a SPAM abuse signalement (probably automatic) for those 2 emails! I could send to those same addresses without problem before.

Do other people have had similar problems with Apple SMTP servers recently? What can we do? TIA

heh. my 2011 rantlet "The Problem Isn't Email, It's Microsoft Exchange" https://nxdomain.no/~peter/the_problem_isnt_email_its_microsoft_exchange.html made this week's "Valuable news" by @vermaden https://vermaden.wordpress.com/2025/03/17/valuable-news-2025-03-17/ #smtp #email #exchange #spam #security #timesinks

I thought I had seen it all when it comes to mail delivery and security issues.

But this morning I was introduced to the fact that there are Exchange admins who will implement a rule that all incoming mail from outside their own organization should be flagged as potentially dangerous and presented to the user with the option to block sender and no option to mark the message or the sender as valid.

Yes, that for every single message.

"Coinbase emails will always come from an email address ending in coinbase.com."
https://nordvpn.com/blog/coinbase-scam-emails/

Open https://www.virustotal.com/gui/ip-address/193.143.1.14/relations (open the RELATIONS tab) and tap ••• a couple of times and you'll see something like (without the [ ] to prevent accidental opening):

587163-coinbase[.]com
756126-coinbase[.]com
36424-coinbase[.]com

Those domains end in "coinbase.com" but do not belong to "coinbase.com".

What the NordVPN author means (and IMO should have clarified) is that the *SMTP* sending email address domain must be either:

• exactly "coinbase.com"

or

• "whatever.coinbase.com"

or

• "repeat.whatvever.coinbase.com"

This, of course, applies to *any* sending email domain, in particular from organizations that are or may be spoofed.