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PureMessage Blocking Valid Message, "Invalid Recipients"

mbjoe

Sophos is blocking a valid inbout email but only blocking it for some recipients, in the Acvitiy Monitor only we see the error: Blocked Message '<---@domain>' for invalid recipients 'example@.com....'

When looking at who should be receiving the email, the first seven recipients receive the email ok, but after that everyone else is blocked.

The message does not get quarantined and does not appear in any other Sophos log. It does however appear in the Exchange Message Tracking log with an error of FAIL and pme12transport.

:9869


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    I found that the reason the emails are being blocked is due to the Recipient Validation setting. Disabling this option allows the emails to be sent through.... but it still doesn't explain why it is blocking it in the first place.

    For example, the user sends to: A@Domain.com, B@Domain.com, C@Domain.com and D@Domain.com

    The email to A@Domain.com will go through OK, but then the other three will be blocked and show in Activity Monitor with:

    Blocked Message <Message ID> for invalid recipients 'B@Domain.com, C@Domain.com, D@Domain.com'

    Another odd thing is that whenever the user adds/removed an address to the list of people being emailed, the number of those who receive it changes.

    The first email was sent to 18 people, 3 received it and 15 were blocked.

    The second email was sent to 19 people, 4 received it and 15 were blocked.

    The third email was sent to 22 people, 7 received it and 15 were blocked.

    It seems like 15 messages always get blocked with the "Blocked Message" while the rest go through. I'm so confused as to why this is happening. I would rather not disable the Validation Filter but that is all that seems to be fixing it.

    :9923
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  • 0

    I found that the reason the emails are being blocked is due to the Recipient Validation setting. Disabling this option allows the emails to be sent through.... but it still doesn't explain why it is blocking it in the first place.

    For example, the user sends to: A@Domain.com, B@Domain.com, C@Domain.com and D@Domain.com

    The email to A@Domain.com will go through OK, but then the other three will be blocked and show in Activity Monitor with:

    Blocked Message <Message ID> for invalid recipients 'B@Domain.com, C@Domain.com, D@Domain.com'

    Another odd thing is that whenever the user adds/removed an address to the list of people being emailed, the number of those who receive it changes.

    The first email was sent to 18 people, 3 received it and 15 were blocked.

    The second email was sent to 19 people, 4 received it and 15 were blocked.

    The third email was sent to 22 people, 7 received it and 15 were blocked.

    It seems like 15 messages always get blocked with the "Blocked Message" while the rest go through. I'm so confused as to why this is happening. I would rather not disable the Validation Filter but that is all that seems to be fixing it.

    :9923
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