Very cool. > For DMARC to pass, DKIM and/or SPF checks need to pass and the domains must be in alignment. AFAIK this is incorrect. It is not "and/or" but rather "or" - only DKIM or SPF needs to pass. There is no method to require both.
Learn and Test DMARC
11–20 of 65 posts
Re: Learn and Test DMARC
#12Earlier quoted context omitted.
For TLS, there’s https://bytebybyte.dev/ and https://tls13.xargs.org/
See also: https://webencrypt.org/illustrated-tls/ >
Re: Learn and Test DMARC
#13I sent an email via Apple’s “Hide My Email” service [1]. > Unhandled Promise Rejection: > TypeError: a.from.replace(/[ > dist.min.js:3:32767 This error occurred after the interface began displaying the following information: > Here are the message headers and message body: > DKIM-Signature: d=icloud.com s=1a1hai It’s been over a year since the website was featured on Hacker News (January 10, 2022), so I suspect that…
Re: Learn and Test DMARC
#14Related: See how DMARC, SPF, and DKIM work interactively - https://news.ycombinator.com/item?id=29869266 - Jan 2022 (108 comments)
Re: Learn and Test DMARC
#15I sent an email via Apple’s “Hide My Email” service [1]. > Unhandled Promise Rejection: > TypeError: a.from.replace(/[ > dist.min.js:3:32767 This error occurred after the interface began displaying the following information: > Here are the message headers and message body: > DKIM-Signature: d=icloud.com s=1a1hai It’s been over a year since the website was featured on Hacker News (January 10, 2022), so I suspect that…
You sent an email without a "from" field and it broke. Programmer didn't think to test for bad users doing bad things. Nothing special here, no big conspiracy.
Re: Learn and Test DMARC
#16This is so cool! I would love to see this for other protocols actually, maybe SSL or something!
Re: Learn and Test DMARC
#17Very cool. > For DMARC to pass, DKIM and/or SPF checks need to pass and the domains must be in alignment. AFAIK this is incorrect. It is not "and/or" but rather "or" - only DKIM or SPF needs to pass. There is no method to require both.
If the "From:"/"Reply-To:" fields contains only the email address with the IP address literal, you get your "SPF" and it gets a much better score in order to avoid grey listing for the first transaction. And if there are no URLs in the content, even better.
But that is common sense.
Re: Learn and Test DMARC
#18Re: Learn and Test DMARC
#19I sent an email via Apple’s “Hide My Email” service [1]. > Unhandled Promise Rejection: > TypeError: a.from.replace(/[ > dist.min.js:3:32767 This error occurred after the interface began displaying the following information: > Here are the message headers and message body: > DKIM-Signature: d=icloud.com s=1a1hai It’s been over a year since the website was featured on Hacker News (January 10, 2022), so I suspect that…
telnet learndmarc.com 25
Trying 87.239.13.42...
Connected to learndmarc.com.
Escape character is '^]'.
220 allspark.uriports.com ESMTP URIports Mail Portal 1.03.2 Sun, 01 Oct 2023 21:55:40 +0000
HELO there
250 allspark.uriports.com Hello []
MAIL From: me@example.com
250 OK
RCPT To: ld-49101f55f6@learndmarc.com
250 Accepted
DATA
354 Enter message, ending with "." on a line by itself
.
250 OK id=1qn4QF-00CUhd-5j
It's funny because while I was typing this, it's like "you don't have to write a love letter". Maybe not, but you do have to repeat the From: and To: header in the data segment, I guess.I remain amused at how much email I've sent over the years with "HELO there" instead of my hostname in there. I also wonder what % of internet traffic is "Enter message, ending with . on a line by itself".
Re: Learn and Test DMARC
#20Very cool. > For DMARC to pass, DKIM and/or SPF checks need to pass and the domains must be in alignment. AFAIK this is incorrect. It is not "and/or" but rather "or" - only DKIM or SPF needs to pass. There is no method to require both.