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  3. If You Can't Do Email Validation Right

If You Can't Do Email Validation Right

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  • A AspDotNetDev

    Don't do it at all. I'm tired of seeing messages like this, all because my email address is a single character (e.g., a@abc.com). I have a proxy email address for situations like this, but it's annoying that I have to do that. :sigh: Recently, I've seen this on an airline website and on the website in the above screenshot. One large company, and one small one. I'm tempted to try this with Code Project just for the heck of it. :rolleyes:

    Thou mewling ill-breeding pignut!

    R Offline
    R Offline
    Rajesh R Subramanian
    wrote on last edited by
    #4

    Some Indian Government websites have told me tings like "You cannot use a 'numeric value' in the address field". :omg:

    "Real men drive manual transmission" - Rajesh.

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    • R Rajesh R Subramanian

      Some Indian Government websites have told me tings like "You cannot use a 'numeric value' in the address field". :omg:

      "Real men drive manual transmission" - Rajesh.

      A Offline
      A Offline
      AspDotNetDev
      wrote on last edited by
      #5

      Simples:

      One Two Three Four First Street Apt One Zero One

      :rolleyes:

      Thou mewling ill-breeding pignut!

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      • A AspDotNetDev

        Don't do it at all. I'm tired of seeing messages like this, all because my email address is a single character (e.g., a@abc.com). I have a proxy email address for situations like this, but it's annoying that I have to do that. :sigh: Recently, I've seen this on an airline website and on the website in the above screenshot. One large company, and one small one. I'm tempted to try this with Code Project just for the heck of it. :rolleyes:

        Thou mewling ill-breeding pignut!

        L Offline
        L Offline
        Lost User
        wrote on last edited by
        #6

        AspDotNetDev wrote:

        I'm tempted to try this with Code Project just for the heck of it.

        Chris scurries into a corner to look at eMail validation ...

        MVVM# - See how I did MVVM my way ___________________________________________ Man, you're a god. - walterhevedeich 26/05/2011 .\\axxx (That's an 'M')

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        • P PaulowniaK

          There's always things people don't expect... For example, my Japanese credit card was routinely rejected in the UK because it has an unusually long valid-till date (+5 years) and the pull down box for entering the valid-till date didn't go that far. :thumbsdown: My email address has a "-" in the bit after the "@", which confused a few sites in the old days but it seems OK these days. :cool:

          Almost, but not quite, entirely unlike... me...

          L Offline
          L Offline
          Lost User
          wrote on last edited by
          #7

          My email address used to be maxxx;drop table user;@gmail.com Had all sorts of problems using it!

          MVVM# - See how I did MVVM my way ___________________________________________ Man, you're a god. - walterhevedeich 26/05/2011 .\\axxx (That's an 'M')

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          • L Lost User

            AspDotNetDev wrote:

            I'm tempted to try this with Code Project just for the heck of it.

            Chris scurries into a corner to look at eMail validation ...

            MVVM# - See how I did MVVM my way ___________________________________________ Man, you're a god. - walterhevedeich 26/05/2011 .\\axxx (That's an 'M')

            A Offline
            A Offline
            AspDotNetDev
            wrote on last edited by
            #8

            :laugh: This too is what I imagined.

            Thou mewling ill-breeding pignut!

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            • L Lost User

              My email address used to be maxxx;drop table user;@gmail.com Had all sorts of problems using it!

              MVVM# - See how I did MVVM my way ___________________________________________ Man, you're a god. - walterhevedeich 26/05/2011 .\\axxx (That's an 'M')

              P Offline
              P Offline
              Peter_in_2780
              wrote on last edited by
              #9

              Your cousin is called Bobby, right? Cheers, Peter

              Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012

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              • P Peter_in_2780

                Your cousin is called Bobby, right? Cheers, Peter

                Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012

                L Offline
                L Offline
                Lost User
                wrote on last edited by
                #10

                No, Bob's my Uncle!

                MVVM# - See how I did MVVM my way ___________________________________________ Man, you're a god. - walterhevedeich 26/05/2011 .\\axxx (That's an 'M')

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                • P PaulowniaK

                  There's always things people don't expect... For example, my Japanese credit card was routinely rejected in the UK because it has an unusually long valid-till date (+5 years) and the pull down box for entering the valid-till date didn't go that far. :thumbsdown: My email address has a "-" in the bit after the "@", which confused a few sites in the old days but it seems OK these days. :cool:

                  Almost, but not quite, entirely unlike... me...

                  I Offline
                  I Offline
                  Indivara
                  wrote on last edited by
                  #11

                  My name is routinely rejected in Japan for various reasons. Too long, invalid characters, too many names, etc

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                  • A AspDotNetDev

                    Don't do it at all. I'm tired of seeing messages like this, all because my email address is a single character (e.g., a@abc.com). I have a proxy email address for situations like this, but it's annoying that I have to do that. :sigh: Recently, I've seen this on an airline website and on the website in the above screenshot. One large company, and one small one. I'm tempted to try this with Code Project just for the heck of it. :rolleyes:

                    Thou mewling ill-breeding pignut!

                    M Offline
                    M Offline
                    Mark_Wallace
                    wrote on last edited by
                    #12

                    Most annoying one I've had recently is a Dutch site that required me to have one of the Dutch "of" words in my name -- I ended up having to rename myself as "Mark de Wallace", just to get past the form validation. I would have used "Mark van Engeland", but I've used it elsewhere, and didn't want the association.

                    I wanna be a eunuchs developer! Pass me a bread knife!

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                    • A AspDotNetDev

                      PaulowniaK wrote:

                      My email address has a "-" in the bit after the "@", which confused a few sites in the old days but it seems OK these days

                      Somebody I know has a "-" in his name. He has had issues with that, and ever since he told me about it I have made sure any validation I do allows for as many characters as is possible.

                      Thou mewling ill-breeding pignut!

                      B Offline
                      B Offline
                      Bassam Abdul Baki
                      wrote on last edited by
                      #13

                      I do and I continue to have problems with it and now I've told you about it.

                      Web - BM - RSS - Math - LinkedIn

                      D 1 Reply Last reply
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                      • A AspDotNetDev

                        Don't do it at all. I'm tired of seeing messages like this, all because my email address is a single character (e.g., a@abc.com). I have a proxy email address for situations like this, but it's annoying that I have to do that. :sigh: Recently, I've seen this on an airline website and on the website in the above screenshot. One large company, and one small one. I'm tempted to try this with Code Project just for the heck of it. :rolleyes:

                        Thou mewling ill-breeding pignut!

                        J Offline
                        J Offline
                        Jonathan C Dickinson
                        wrote on last edited by
                        #14

                        The only way to validate an email address is to send an email to it, so do 'soft validation': a warning that does not prevent form submission

                        He who asks a question is a fool for five minutes. He who does not ask a question remains a fool forever. [Chinese Proverb] Jonathan C Dickinson (C# Software Engineer)

                        S 1 Reply Last reply
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                        • A AspDotNetDev

                          Don't do it at all. I'm tired of seeing messages like this, all because my email address is a single character (e.g., a@abc.com). I have a proxy email address for situations like this, but it's annoying that I have to do that. :sigh: Recently, I've seen this on an airline website and on the website in the above screenshot. One large company, and one small one. I'm tempted to try this with Code Project just for the heck of it. :rolleyes:

                          Thou mewling ill-breeding pignut!

                          F Offline
                          F Offline
                          Florin Jurcovici
                          wrote on last edited by
                          #15

                          I was once very seriously advised by a mail server admin not to use "/" in email addresses before "@" because it's not a valid character there. I told him to go read the RFC, which he refused to do. I can only say "WTF!?".

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                          • B Bassam Abdul Baki

                            I do and I continue to have problems with it and now I've told you about it.

                            Web - BM - RSS - Math - LinkedIn

                            D Offline
                            D Offline
                            DerekT P
                            wrote on last edited by
                            #16

                            I too have a long, double-barreled name. I take the greatest exception to website forms that tell me "Your name is invalid". That's a sure way to upset your potential customers very quickly indeed. My company name is long, and hence my email address is too. It's usually OK online but had to fill in a passport form this weekend where there weren't enough characters... :-(

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                            • J Jonathan C Dickinson

                              The only way to validate an email address is to send an email to it, so do 'soft validation': a warning that does not prevent form submission

                              He who asks a question is a fool for five minutes. He who does not ask a question remains a fool forever. [Chinese Proverb] Jonathan C Dickinson (C# Software Engineer)

                              S Offline
                              S Offline
                              svella
                              wrote on last edited by
                              #17

                              Jonathan C Dickinson wrote:

                              The only way to validate an email address is to send an email to it

                              Somewhere along the line something's got to validate it. If you are using some sort of framework, then the framework will likely do the necessary validation for you, but if you are using the raw SMTP protocol or something that is a thin wrapper around it, failing to check for characters that are part of the protocol (e.g. comma, colon, semi-colon or new line characters) opens you up to injection attack vulnerability.

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                              • A AspDotNetDev

                                Don't do it at all. I'm tired of seeing messages like this, all because my email address is a single character (e.g., a@abc.com). I have a proxy email address for situations like this, but it's annoying that I have to do that. :sigh: Recently, I've seen this on an airline website and on the website in the above screenshot. One large company, and one small one. I'm tempted to try this with Code Project just for the heck of it. :rolleyes:

                                Thou mewling ill-breeding pignut!

                                P Offline
                                P Offline
                                PIEBALDconsult
                                wrote on last edited by
                                #18

                                As developers it is our duty to try to break the work of others. :cool:

                                A 1 Reply Last reply
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                                • A AspDotNetDev

                                  Don't do it at all. I'm tired of seeing messages like this, all because my email address is a single character (e.g., a@abc.com). I have a proxy email address for situations like this, but it's annoying that I have to do that. :sigh: Recently, I've seen this on an airline website and on the website in the above screenshot. One large company, and one small one. I'm tempted to try this with Code Project just for the heck of it. :rolleyes:

                                  Thou mewling ill-breeding pignut!

                                  R Offline
                                  R Offline
                                  RafagaX
                                  wrote on last edited by
                                  #19

                                  Most websites expect an email address to be longer than 1 char, this is because when people don't want to give their email address, they usually use a@a.com or sometihng that short.

                                  CEO at: - Rafaga Systems - Para Facturas - Modern Components for the moment...

                                  A 1 Reply Last reply
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                                  • R RafagaX

                                    Most websites expect an email address to be longer than 1 char, this is because when people don't want to give their email address, they usually use a@a.com or sometihng that short.

                                    CEO at: - Rafaga Systems - Para Facturas - Modern Components for the moment...

                                    A Offline
                                    A Offline
                                    AspDotNetDev
                                    wrote on last edited by
                                    #20

                                    Which wouldn't be of much use, because validation would fail, then they'd change it to ab@ab.com.

                                    Thou mewling ill-breeding pignut!

                                    P 1 Reply Last reply
                                    0
                                    • P PIEBALDconsult

                                      As developers it is our duty to try to break the work of others. :cool:

                                      A Offline
                                      A Offline
                                      AspDotNetDev
                                      wrote on last edited by
                                      #21

                                      One of my first jobs was to do quality assurance; it is now a natural impulse to try to break the work of others. :-D

                                      Thou mewling ill-breeding pignut!

                                      1 Reply Last reply
                                      0
                                      • A AspDotNetDev

                                        Which wouldn't be of much use, because validation would fail, then they'd change it to ab@ab.com.

                                        Thou mewling ill-breeding pignut!

                                        P Offline
                                        P Offline
                                        PIEBALDconsult
                                        wrote on last edited by
                                        #22

                                        I tend to use Fuck@You.com for that.

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                                        • A AspDotNetDev

                                          PaulowniaK wrote:

                                          My email address has a "-" in the bit after the "@", which confused a few sites in the old days but it seems OK these days

                                          Somebody I know has a "-" in his name. He has had issues with that, and ever since he told me about it I have made sure any validation I do allows for as many characters as is possible.

                                          Thou mewling ill-breeding pignut!

                                          G Offline
                                          G Offline
                                          greldak
                                          wrote on last edited by
                                          #23

                                          I do as well and find a few sites where the site itself will accept the email address but the validation email its supposed to send is never received.

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