Forum Discussion

Graeme Lee's avatar
Graeme Lee
Copper Contributor
Mar 07, 2018
Solved

reject emails to 2 recipients

Hi,

 

I want to set a Exchange server rule so that anyone that sends and email to address1 AND address2 in the To: field can be rejected. They should be able to send individually to address1 OR address2 but not in the same email.

 

Seems to only have the option to block multiple recipients using OR

 

Is there any way to do this?  I have done a rule that they can't address address1 or address2 in the CC box which is fine, but they bypass that by just using the To field to those addresses.  It created issues with our auto-ticketing systems so needs stopping somehow and asking politely doesn't work

 

Any help appreciated

exchange
office 365
  • Ricardo Viana's avatar
    Ricardo Viana
    Mar 07, 2018
    I'm not sure why you have created 6 rules.

    Just to be clear about my idea I will attach a screenshot.

    So, for example:
    A@contoso.com
    B@contoso.com
    C@contoso.com

    Security groups:
    Sec1@contoso.com = a+b
    Sec2@contoso.com = a+c
    Sec3@contoso.com = b+c

    Rules:
    1) to: c + any member of sec1
    2) to: b + any member of sec2
    3) to: a + any member of sec3

    I look forward to hearing from you.

4 Replies

  • Ricardo Viana's avatar
    Ricardo Viana
    Steel Contributor
    Mar 07, 2018
    Hi Graeme,

    I would create a security group hidden from GAL and add one of the addresses you want to block. Then create a transport rule:

    Apply this rule if...
    1) the message >to box contains this person
    2) the message >to box contains a member of this group

    Do the following...
    Reject the message with an explanation

    Hope this helps!
    • Graeme Lee's avatar
      Graeme Lee
      Copper Contributor
      Mar 07, 2018

      Hi Ricardo,

       

      Many thanks for this.  Good thinking!

       

      There is actually 3 addresses I need to incorporate, so I have made 6 rules as it's unlikely they will send to all 3 helpdesk addresses at once, two addresses happens!

      I will let it all replicate and feedback tomorrow.

       

      Many thanks for the help

      Regards

      • Ricardo Viana's avatar
        Ricardo Viana
        Steel Contributor
        Mar 07, 2018
        I'm not sure why you have created 6 rules.

        Just to be clear about my idea I will attach a screenshot.

        So, for example:
        A@contoso.com
        B@contoso.com
        C@contoso.com

        Security groups:
        Sec1@contoso.com = a+b
        Sec2@contoso.com = a+c
        Sec3@contoso.com = b+c

        Rules:
        1) to: c + any member of sec1
        2) to: b + any member of sec2
        3) to: a + any member of sec3

        I look forward to hearing from you.