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exim sender_verify

Discussion in 'General Discussion' started by freakysid, Dec 9, 2004.

  1. freakysid

    freakysid Well-Known Member

    Mar 5, 2002
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    Is sender_verify neccessary in exim in your opinion? Would using sender_try_verify be more useful a setting?

    I get a few (not many) support requests from time to time from customers unable to receive mail from a sender with the cause being that sender was not verified because of the sender's domain having dodgy DNS records - for example a user@subdomain.domain but there is no A or CNAME record for subdomain.domain.

    If I change the sender_verify setting to sender_try_verify am I going to be opening the flood-gates to hell and destruction?

  2. chirpy

    chirpy Well-Known Member

    Jun 15, 2002
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    Go on, have a guess
    I think sender_verify is a good compromise in not checking and checking whether the account actually exists (which you can do with sender_verify). It is not too much to ask that DNS is correctly setup and I find that it does block a good proportion of spam. Since there is good reason not to accept email from a sender that fails the check, I can't see any reason to relax the checking.

    Edit: Just thought that I would add this:

    I don't think disabling it would be that bad, though spam would rise. If you did, I would recommend (which I do anyway) that you put in a dictionary attack ACL:

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