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Omit Sender verify for certain mails?

Discussion in 'E-mail Discussion' started by gflamerich, Oct 17, 2005.

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  1. gflamerich

    gflamerich Well-Known Member

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    Hi
    This should sound extrange, but we have a client who needs to receive emails from a couple of addresses that doesn't pass sender verification.
    We alredy tryed to talk to the other end to correct the problem, but there are huge Companies and wont' change their policy ..... so here we are......
    We have sender verification activated (and want to keep it htat way), so want to know if its possible to bypass sender verification for some addresses. Don't know witch is better, a whole domain, IP address, individual email address, but at this point, any option may help.
    Thanks
     
    #1 gflamerich, Oct 17, 2005
  2. nisse

    nisse Well-Known Member

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    You could do it like this in exim.conf:

    addresslist whitelist_senders = wildlsearch;/etc/whitelist_senders

    Then put the sender addresses in the file /etc/whitelist_senders, one per line, e.g.

    someone@domain1.tld
    *@domain2.tld

    Then add the following line to your sender verify statement:

    !senders = +whitelist_senders
     
    #2 nisse, Oct 17, 2005
  3. gflamerich

    gflamerich Well-Known Member

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    Thank you for you reply,
    Could you be so kind and be a little more spcecific on where should I put the
    !senders = +whitelist_senders

    Here is our config

    #!!# ACL that is used after the RCPT command
    check_recipient:
    # Exim 3 had no checking on -bs messages, so for compatibility
    # we accept if the source is local SMTP (i.e. not over TCP/IP).
    # We do this by testing for an empty sending host field.
    accept hosts = :

    # Always accept mail to postmaster & abuse for any local domain
    accept domains = +local_domains
    local_parts = postmaster:abuse

    # Accept bounces to lists even if callbacks or other checks would fail
    warn message = X-WhitelistedRCPT-nohdrfromcallback: Yes
    condition = \
    ${if and {{match{$local_part}{(.*)-bounces\+.*}} \
    {exists {/usr/local/cpanel/3rdparty/mailman/lists/${lc:$1}/config.pck}}} \
    {yes}{no}}

    accept condition = \
    ${if and {{match{$local_part}{(.*)-bounces\+.*}} \
    {exists {/usr/local/cpanel/3rdparty/mailman/lists/${lc:$1}/config.pck}}} \
    {yes}{no}}


    # Accept bounces to lists even if callbacks or other checks would fail
    warn message = X-WhitelistedRCPT-nohdrfromcallback: Yes
    condition = \
    ${if and {{match{$local_part}{(.*)-bounces\+.*}} \
    {exists {/usr/local/cpanel/3rdparty/mailman/lists/${lc:$1}_${lc:$domain}/config.pck}}} \
    {yes}{no}}

    accept condition = \
    ${if and {{match{$local_part}{(.*)-bounces\+.*}} \
    {exists {/usr/local/cpanel/3rdparty/mailman/lists/${lc:$1}_${lc:$domain}/config.pck}}} \
    {yes}{no}}

    #if it gets here it isn't mailman

    #sender verifications are required for all messages that are not sent to lists

    require verify = sender/callout=5s,defer_ok
    accept domains = +local_domains
    endpass

    #recipient verifications are required for all messages that are not sent to the local machine
    #this was done at multiple users requests

    message = "The recipient cannot be verified. Please check all recipients of this message to verify they are valid."
    verify = recipient

    accept domains = +relay_domains

    warn message = ${perl{popbeforesmtpwarn}{$sender_host_name}}
    hosts = +relay_hosts
    accept hosts = +relay_hosts

    warn message = ${perl{popbeforesmtpwarn}{$sender_host_address}}
    condition = ${perl{checkrelayhost}{$sender_host_address}}
    accept condition = ${perl{checkrelayhost}{$sender_host_address}}

    accept hosts = +auth_relay_hosts
    endpass
    message = $sender_fullhost is currently not permitted to \
    relay through this server. Perhaps you \
    have not logged into the pop/imap server in the \
    last 30 minutes or do not have SMTP Authentication turned on in your email client.
    authenticated = *

    deny message = $sender_fullhost is currently not permitted to \
    relay through this server. Perhaps you \
    have not logged into the pop/imap server in the \
    last 30 minutes or do not have SMTP Authentication turned on in your email client.


    #!!# ACL that is used after the DATA command
    check_message:
    require verify = header_sender
    accept
     
    #3 gflamerich, Oct 17, 2005
  4. nisse

    nisse Well-Known Member

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    It should go here:

    Code:
    #sender verifications are required for all messages that are not sent to lists

require verify   = sender/callout=5s,defer_ok
        !senders = +whitelist_senders

accept domains = +local_domains
endpass
     
    #4 nisse, Oct 17, 2005
  5. gflamerich

    gflamerich Well-Known Member

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    Nisse
    Thank you very much!
     
    #5 gflamerich, Oct 17, 2005
  6. gflamerich

    gflamerich Well-Known Member

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    Doesn't seems to be working properly....
    Here is the log. We sent an email to test and had this at the mail log. Now, after accepting the sender as valid, rejects the local address ...

    H=(mail.inwhitelist.net) [##.###.###.###] F=<adress@inwhitelist.com> rejected RCPT <valid@emailaccount.net>
     
    #6 gflamerich, Oct 17, 2005
  7. nisse

    nisse Well-Known Member

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    Ah, sorry about that - it's because of the way the "require" verb works. Give me a few minutes and I'll come up with something.
     
    #7 nisse, Oct 17, 2005
  8. nisse

    nisse Well-Known Member

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    Ok, change it to this:

    Code:
    deny
  !verify   = sender/callout=5s,defer_ok
  !senders  = +whitelist_senders
  
accept domains = +local_domains
endpass
    Something I missed the first time round; you also need to change this at the bottom:

    Code:
    check_message:
deny
  !verify   = header_sender
  !senders  = +whitelist_senders
accept
    Hope this works! :)
     
    #8 nisse, Oct 17, 2005
  9. gflamerich

    gflamerich Well-Known Member

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    Yes, it works!
    Thanks again
     
    #9 gflamerich, Oct 17, 2005
  10. wkdwich

    wkdwich Well-Known Member

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    I totally get the rest of this repair.. but is this line also being added to the exim conf file?? If so where??
     
    #10 wkdwich, Aug 14, 2006
  11. AlexAT

    AlexAT Well-Known Member
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    Does not work from my side.
    1. I create whitelist_senders file in the /etc dir:
    Code:
    ls -l /etc/whitelist_senders 
-rw-r--r--    1 root     root           19 Aug 31 14:19 /etc/whitelist_senders
    2. I put such instructions in the exim configuration via WHM.

    Then my exim_mainlog contains the following:
    Code:
    2006-08-31 14:19:19 1GIkZr-0002CD-Tn unknown named address list "+whitelist_senders"
2006-08-31 14:19:22 1GIkZs-0002Cq-1D unknown named address list "+whitelist_senders"
2006-08-31 14:19:22 1GIkZq-0002Cm-L2 unknown named address list "+whitelist_senders"
2006-08-31 14:19:23 1GIkZu-0002Cp-ND unknown named address list "+whitelist_senders"
2006-08-31 14:19:24 1GIkZr-0002Co-Oi unknown named address list "+whitelist_senders"
2006-08-31 14:19:27 1GIkZx-0002Cz-Cp unknown named address list "+whitelist_senders"
...
    Could you please advice, where the problem is?
    Thank you.
     
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    #11 AlexAT, Aug 31, 2006
  12. AlexAT

    AlexAT Well-Known Member
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    I already found an answer.
    I forgot to create alias:
    Code:
    addresslist whitelist_senders = wildlsearch;/etc/whitelist_senders
    Now all works like a charm.
    Thank you !
     
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    #12 AlexAT, Aug 31, 2006
  13. GPH

    GPH Member

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    Hi, I tried to implement this but got a syntax error on !senders = +whitelist_senders

    Is there any info you require?


    Thanks
     
    #13 GPH, Sep 16, 2006
  14. GPH

    GPH Member

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    Just tried again and still get the error...


    And this is what i have in the config..


    Thanks
     
    #14 GPH, Sep 17, 2006
  15. furquan

    furquan Well-Known Member

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    Hi,

    I am also getting the same error, and m not sure how to get this resolved :


    Has any one found a solution yet ?


    Thanks
     
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    #15 furquan, Oct 15, 2006
  16. furquan

    furquan Well-Known Member

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    Pardon my ignorance, But how did you create that alias. Where do i need to enter that ?

    Thanks
     
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    #16 furquan, Oct 15, 2006
  17. troubleshooter

    troubleshooter Member

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    In the first section of your exim configuration file where all the other lists are declared. It's the first editable section in WHM.

    Terry
     
    #17 troubleshooter, Oct 15, 2006
  18. furquan

    furquan Well-Known Member

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    Terry :

    Thanks for the response. Reconfirm again .....

    Is it the very first blank box in the Advnace mode of "Exim Configuration Editor"

    Coz that is blank at the moment.

    Thanks
     
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    #18 furquan, Oct 15, 2006
  19. troubleshooter

    troubleshooter Member

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    Yes, the very first section.

    This is a sample of what I have in my first section.

    Code:
    ## sender address lists
addresslist sender_whitelist= lsearch*@;/etc/exim/sender_whitelist
addresslist sender_blacklist= lsearch*@;/etc/exim/sender_blacklist
    I have customized my configuration to use different lists for various things in my ACLs. The first section is where the lists are put and other types of customisations. You;d need to look at the exim docs to see what else can be customised there. Other sections of exim.conf (the ACLs) refer to the first section when I reference a list. You reference a list as +listname - example if I wanted to use /etc/exim/sender_whitelist I'd refer to it in an ACL as +sender_whitelist. If you haven't used any lists or customised anything else, it's not uncommon to have a blank first section.

    Terry
     
    #19 troubleshooter, Oct 15, 2006
  20. furquan

    furquan Well-Known Member

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    Thanks a lot for your response Terry.

    I had this issue for the whole last week...and i did not realise that the Alias was missing.

    Thanks a lot.
     
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    #20 furquan, Oct 15, 2006
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