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Could not send e-mail because address has ".@"

    Question

  • Hello!

    I have a problem with the exchange server because when I want to send an e-mail that has this combination ".@" it gives the following error: "one or more recipients are invalid" and that is NOT true. There is any possibility to solve the regular expresion that verify the format of an e-mail address?

    Gmails users are allow to choose that combination for an e-mail address and is impossible send an e-mail throw an exchange server.

    Thanks in advance.

    Tuesday, December 29, 2015 5:38 PM

Answers

  • Hi,

    Please see the below quotes from RFC 3696 (https://tools.ietf.org/html/rfc3696#section-3):

    "Contemporary email addresses consist of a "local part" separated from a "domain part" (a fully-qualified domain name) by an at-sign ("@")."

    "Without quotes, local-parts may consist of any combination of
       alphabetic characters, digits, or any of the special characters

          ! # $ % & ' * + - / = ?  ^ _ ` . { | } ~

       period (".") may also appear, but may not be used to start or end the
       local part, nor may two or more consecutive periods appear."

    Basically, the part before the @ sign cannot end in a . 

    Thanks.


    Please mark as an answer if this answers your question

    Mark Gossa

    MCSE 2003, MCITP Enterprise Administrator 2008 R2, MCSA 2012 R2, MCTS Exchange 2010, MCTS SQL 2012, MCTS SharePoint 2007, VCP4, VCP5, CCNA

    Blog: http://markgossa.blogspot.com   LinkedIn:

    Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

    Tuesday, December 29, 2015 8:19 PM

All replies

  • Hi,

    Please see the below quotes from RFC 3696 (https://tools.ietf.org/html/rfc3696#section-3):

    "Contemporary email addresses consist of a "local part" separated from a "domain part" (a fully-qualified domain name) by an at-sign ("@")."

    "Without quotes, local-parts may consist of any combination of
       alphabetic characters, digits, or any of the special characters

          ! # $ % & ' * + - / = ?  ^ _ ` . { | } ~

       period (".") may also appear, but may not be used to start or end the
       local part, nor may two or more consecutive periods appear."

    Basically, the part before the @ sign cannot end in a . 

    Thanks.


    Please mark as an answer if this answers your question

    Mark Gossa

    MCSE 2003, MCITP Enterprise Administrator 2008 R2, MCSA 2012 R2, MCTS Exchange 2010, MCTS SQL 2012, MCTS SharePoint 2007, VCP4, VCP5, CCNA

    Blog: http://markgossa.blogspot.com   LinkedIn:

    Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

    Tuesday, December 29, 2015 8:19 PM
  • Hi,

    Just type the destination address without the . and it will go to same person.

    Gmail doesn't care about the dot.

    https://support.google.com/mail/answer/10313?hl=en

    Expand the first menu:

    Your address is similar but has more or fewer dots (.) or different capitalization.

    Gmail doesn't recognize dots as characters within usernames, you can add or remove the dots from a Gmail address without changing the actual destination address; they'll all go to your inbox, and only yours. In short:

    • homerjsimpson@gmail.com = hom.er.j.sim.ps.on@gmail.com
    • homerjsimpson@gmail.com = HOMERJSIMPSON@gmail.com
    • homerjsimpson@gmail.com = Homer.J.Simpson@gmail.com

    All these addresses belong to the same person. You can see this if you try to sign in with your username, but adding or removing a dot from it. You'll still go to your account.

    • Edited by JJJJRRRR Tuesday, December 29, 2015 11:51 PM
    Tuesday, December 29, 2015 11:49 PM
  • This forum is for Exchange development questions. Please post questions about mail flow to the mail flow forum on TechNet. Thanks for your understanding.
    Wednesday, January 6, 2016 2:49 PM