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Is it possible to create an exception for the "Sender blacklist" ?

Hi,

because of a recent spam attack, one of my customers faced, I blocked their own Domain with the "Sender Blacklist" option. In general this works because the smtp-proxy does not block (probably because of the allowed relay settings) mails where the senderaddress is from the customers maildomain. The result is, that only mails from unknown hosts are blocked.

But in this case, the customer gets inbound emails from two other trusted mailsystems, that should be allowed to send mails with the customers domain. Because of this, I wanted to create an exception. But it seems, that this is not possible... I thought I can use a "antispam checking" exception for bypassing the sender blacklist....

Any ideas? What´s about the expression blocking? To what part of the mail is it applied? Can I use this to match the sender address or domain?



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  • Ok, i think thats an unexpected behaviour then.... But I never used spf in general so far.

    I think that your workarround is not quite good, because you skip all the important antispam features from the utm... I think it would be better to simply add your trusted mailservers to the allowed host for relay. I think then you don´t need any NAT Rules and your utm would do all the mail checks again?!

    Regards
    Sebastian
  • Hi Sebastian,

    I have tried to set the trusted servers to allow them to relay but that does not work.
    E-mails are still getting blocked when i only set it te relay.
    I Agree that this workaround with the NAT rule is not a perfect sollution because we want te check spam / virusses but i did not find any other way to get it to work.

    Greetz, Patrick