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Many systems support the use of alias with a character such as +. So, makerofthings7+c6201404b8efbe@invalid-email.com would be equivalent to makerofthings7@invalid-email.com for the MDA (ie. they would end up in the same mailbox). Then, you keep a list of whitelisted tokens (maybe paired with the From header they must use): ...


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There are a few things you can try to help prevent malicious actors from abusing your service: Require a CAPTCHA: This should help cut down on bots abusing your services. Limit usage of this feature by IP address & time: Don't let a single IP send large amount of mail within a short period of time (keep in mind that you may have multiple users behind ...


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When you read the headers, you see that the system you received that message from is server04.funet.co.il. [212.29.215.70] so that's where the spam should be reported. Now that domain does not appear to be available in English so your first option is to follow RFC 2142 recommendation and send the complain in English (with all the details about this spam) to ...


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CAPTCHA are not necessarily needed nor or they the only solution. Defense in depth means using multiple tactics, layers, and techniques. If you have information you can try to determine the likelihood that the client talking to your web app is (A) a human and (B) a human you want accessing your site. There are reputation services out there that can provide ...


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The answer overall is: you can distinguish between human and spambots based on the spambot developers' willingness to attack you specifically. There are two categories of defences essentially: bot/human distinction and methods to increase the cost of carrying out attacks. Distinguishing bots from humans A lot of alternative techniques to CAPTCHAs in the ...


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I use a different mail for every service, like facebook@mydomain.com, google@mydomain.com etc. This way I can see who sells my data or gets hacked (poor adobe@mydomain.com; )). Also I don't have to change 50 profiles after one incident but only one. To adress your problem with Office360: I made a catch-all adress on my domain, where all mails arrive, so I ...



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