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  • Sonni Tost 20 posts 72 karma points
    Feb 19, 2016 @ 09:23
    Sonni Tost

    Member validation - single character domain fails

    Hi all,

    I have a problem regarding creation of members in Umbraco 7.3.4. When i try to create a user with an e-mail with a single letter domain it fails.

    For example this e-mail will fail:

    How and where can i change the validation so it accepts the pattern above?

    I have screen dump of the issue here:

    Kind regards

    Sonni T.

  • Jan Skovgaard 11257 posts 23497 karma points MVP 7x admin c-trib
    Feb 19, 2016 @ 16:30
    Jan Skovgaard

    Hi Sonni

    I tried searching the term "invalid email" in the source code for Umbraco - I suspect it's this directive that is handling the validation when creating memembers too

    However it seems that the regex used should allow for a single domain letter when testing the expression at

    This is just the file I suspect handles it - But the search gave me 58 results so I could be missing something - But this seems to be the most exact one.

    Have you checked the /App_Data/Logs file to see if it contains any useful information regarding the issue?


  • Sean 4 posts 74 karma points
    Jul 15, 2019 @ 17:41

    Hi @Jan, Is there any traction on this issue? I'm experiencing the exact same problem. Users cannot sign up to be members with a single character domain name, however, it is possible for existing members to UPDATE their email address to contain a single character domain name.

    Any advice on how we can allow this for both creating and updating membership emails? Thanks

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