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I found a few links that claimed to be able to verify an email address online. I thought that was interesting so I tried a few. Turns out they do not work. They only verify the domain, not the full email. 
There are only 10 types of people in the world, those who understand binary and those who don't.
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Of course they don't work, there is no way they even could.
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Oh, no. They definitely work.
Those email addresses are now signed up for a large number of "special offerings".
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You can test using telnet and thought that perhaps they were doing that behind the scenes.
There are only 10 types of people in the world, those who understand binary and those who don't.
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RyanDev wrote: You can test using telnet
Verify an email address using telnet? 
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Yup. Like this[^]
This space for rent
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Thank you, Pete. 
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Just make sure to read notes 3 and 4 in Petes link.
Catch all gets increasingly common, for spam reasons. To lower the value of spamming lists, and also to make it easier to find spammers.
Which brings us to note four, the most common reason to do this check is to keep your spamming lists updated, it's by some companies considered to be one of the more reliable spammer indicators.
Overuse it and you're blacklisted.
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Of course... Because all mail servers left port 25 open for insecure telnet communication...
Skipper: We'll fix it.
Alex: Fix it? How you gonna fix this?
Skipper: Grit, spit and a whole lotta duct tape.
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How would a mail server know if there is another mail server or a telnet client in the other end?
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Ask him nicely?
Skipper: We'll fix it.
Alex: Fix it? How you gonna fix this?
Skipper: Grit, spit and a whole lotta duct tape.
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Many mail servers don't give an immediate error these days as an anti-spam measure and to prevent bots from brute-forcing out a list of valid users.
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harold aptroot wrote:
Of course they don't work, there is no way they even could. |
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No. Actually... this is absolutely possible if the mail server software follows the smtp protocol specification.
Showing my age here... but for many years I used telnet to connect to my e-mail provider to send/receive mail. You can still do it... try it.
In the old days you could telnet into a smtp mail server at port 25 and do:
RCPT TO:<some.address@somewhere.net>
To which the mail server would immediately respond:
550 No such user
This is still the latest standard smtp protocol as described in RFC 5321 section 3.3[^]
Best Wishes,
-David Delaune
modified 3-Nov-16 6:35am.
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That was linked too. It's useless, but I guess it depends on your definition of "verify". An account existing doesn't mean it's the right address, it could still be mistyped, misremembered, or especially intentionally wrong because it does literally nothing to stop that. It doesn't even mean it actually exists, it could be one of those 1-minute temporary inboxes. It would catch some typos I suppose.
I would definitely not consider the address "verified" after this. "Verified for spam purposes" perhaps.
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Don't tell me that ms has got you spamming e-mail saying that winio is the Best Windows Evah now!
Jeeze, what some people will do for wu mao.
I wanna be a eunuchs developer! Pass me a bread knife!
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(Because, as everyone knows, there is a top and a bottom.)
And if anyone has ever been so crazy as to try such a thing, please report: did it still taste as good?
*RQOTD = "Random Question of the Day"
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Everyone in Australia eats them upside down -- after all, everyone there is upside down!
Marc
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I concur!
Kudos for pointing that out so well!   
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Why, thank you.
This[^] may be considerably hard for a number of people to envision (there's no up or down, duh. It's a spheroid for God's sake).
But if understood, it could possibly open up ones mind to observe the Earth's trajectory and spin from different perspectives. 
modified 3-Nov-16 3:49am.
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I think I have one such map somewhere in my home! 
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¿ʇɐɥʇ op noʎ pıp ʍoɥ 'ןooɔ
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And any lunatic would eat them inside out ?
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I often do this as some hamburgers are a little drippy and the top bun is better at absorbing the drips before they drip on you! Also, sometimes by the time you unwrap a take-out burger the bottom bun has become soaked and soggy so flipping it upside down provides a more robust "plate".
- I would love to change the world, but they won’t give me the source code.
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24 points for getting the word "robust" into a workable sentence, that has nothing to do with software development. 
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