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Joined 1 year ago
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Cake day: July 23rd, 2023

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  • Ocelot@lemmies.worldtoMemes@lemmy.mlJesus and Capitalists
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    1 year ago

    Can you please edit Stalin’s wikipedia page? I’m sure it could benefit from the input of someone with your level of expertise. Particularly the areas around his vindictive personality, executions, and torture.

    There are hundreds of cited sources in there, those will also need to be updated. Thanks!





  • This isn’t really going to be accurate all the time. It is a totally reasonable configuration to use a mailserver not in the MX records. Lots of companies that send automated emails use a service like mailgun or sendgrid as a relay, which isn’t their MX server. It doesn’t come from their company’s mailserver. The only way to validate that is by adding mailgun/sendgrid as an include in the SPF record.

    PTR records are very difficult to maintain for any accuracy since lots of companies use cloud providers and don’t bring their own IPs.

    You’ll often miss things like “Your credit card expired” or “please change your password” or even “Here’s your monthly bill from the power company” emails.



  • When you send an email to a mail server, you can set the “FROM” address to literally anything. The mail server does not care and forwards stuff on, as long as you’re authenticated. Anyone can run their own mail server anywhere that will dutifully just relay emails, which is what spammers often do. There are entries in DNS called SPF records (Sender Policy Framework) which mailservers use to validate on the receiving side that the FROM address coming from the mail server matches with a list of allowed mail servers IP address(es). If it doesn’t match it gets sent to spam, or outright rejected (depending on if the record says ~all or -all). It is often not ideal to reject any message that fails this check, because if you have some local system that runs its own mailserver and sends alert emails it might not necessarily match.