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sender verify
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Jeff Allen
*nix forums beginner


Joined: 18 Jul 2006
Posts: 1

PostPosted: Tue Jul 18, 2006 6:36 pm    Post subject: sender verify Reply with quote
Hi,



I have looked around but have yet to come up with a solution that works
on my exim box. I am running Exim 4.43 with Spamassassin and a MySQL
backend that is setup to run LDAP lookups to our internal Exchange
servers. My problem lies with a partner of ours who have an option on
there website to reset passwords. The email address that sends the new
password is not valid on there server and they refuse to create the
account or an alias for this email as according to them I am the only
person in the world using sender verify. Here is what I see in my logs.



2006-07-18 11:36:33 H=navgwout.blah.com [198.] sender verify fail for
<badaddress@blah.com>: response to "RCPT TO:<badaddress@blah.com>" from
extu-mxib-1.blah.com [216.] was: 550 5.0.0 <badaddress@blah.com>... User
unknown

2006-07-18 11:36:33 H=navgwout.blah.com [198.6.49.12]
F=<badaddress@blah.com> rejected RCPT <me@mydomain.com>: Sender verify
failed



I have tried commenting out anything to do with sender verify in my
configure file but that didn't seem to help... Any ideas?



Thanks in advance,

Jeff

--
## List details at http://www.exim.org/mailman/listinfo/exim-users
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://www.exim.org/eximwiki/
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Odhiambo G. Washington
*nix forums Guru Wannabe


Joined: 03 Feb 2005
Posts: 184

PostPosted: Tue Jul 18, 2006 7:10 pm    Post subject: Re: sender verify Reply with quote
* On 18/07/06 14:36 -0400, Jeff Allen wrote:
| Hi,
|
|
|
| I have looked around but have yet to come up with a solution that works
| on my exim box. I am running Exim 4.43 with Spamassassin and a MySQL
| backend that is setup to run LDAP lookups to our internal Exchange
| servers. My problem lies with a partner of ours who have an option on
| there website to reset passwords. The email address that sends the new
| password is not valid on there server and they refuse to create the
| account or an alias for this email as according to them I am the only
| person in the world using sender verify. Here is what I see in my logs.
|
|
|
| 2006-07-18 11:36:33 H=navgwout.blah.com [198.] sender verify fail for
| <badaddress@blah.com>: response to "RCPT TO:<badaddress@blah.com>" from
| extu-mxib-1.blah.com [216.] was: 550 5.0.0 <badaddress@blah.com>... User
| unknown
|
| 2006-07-18 11:36:33 H=navgwout.blah.com [198.6.49.12]
| F=<badaddress@blah.com> rejected RCPT <me@mydomain.com>: Sender verify
| failed
|
|
|
| I have tried commenting out anything to do with sender verify in my
| configure file but that didn't seem to help... Any ideas?

I think you can work around this by using a rule in acl_smtp_mail:

accept senders = badaddress@blah.com

This way, its processing does not get to acl_smtp_rcpt.

HTH!


cheers
- wash
+----------------------------------+-----------------------------------------+
Odhiambo Washington . WANANCHI ONLINE LTD (Nairobi, KE) |
wash () WANANCHI ! com . 1ere Etage, Loita Hse, Loita St., |
GSM: (+254) 722 743 223 . # 10286, 00100 NAIROBI |
GSM: (+254) 733 744 121 . (+254) 020 313 985 - 9 |
+---------------------------------+------------------------------------------+
"Oh My God! They killed init! You Bastards!"
--from a /. post

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## List details at http://www.exim.org/mailman/listinfo/exim-users
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://www.exim.org/eximwiki/
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Bill Hacker
*nix forums Guru


Joined: 27 Jan 2005
Posts: 427

PostPosted: Tue Jul 18, 2006 7:17 pm    Post subject: Re: sender verify Reply with quote
Jeff Allen wrote:

Quote:
Hi,



I have looked around but have yet to come up with a solution that works
on my exim box. I am running Exim 4.43 with Spamassassin and a MySQL
backend that is setup to run LDAP lookups to our internal Exchange
servers. My problem lies with a partner of ours who have an option on
there website to reset passwords. The email address that sends the new
password is not valid on there server and they refuse to create the
account or an alias for this email as according to them I am the only
person in the world using sender verify. Here is what I see in my logs.



2006-07-18 11:36:33 H=navgwout.blah.com [198.] sender verify fail for
badaddress@blah.com>: response to "RCPT TO:<badaddress@blah.com>" from
extu-mxib-1.blah.com [216.] was: 550 5.0.0 <badaddress@blah.com>... User
unknown

2006-07-18 11:36:33 H=navgwout.blah.com [198.6.49.12]
F=<badaddress@blah.com> rejected RCPT <me@mydomain.com>: Sender verify
failed



I have tried commenting out anything to do with sender verify in my
configure file but that didn't seem to help... Any ideas?



Thanks in advance,

Jeff


First, it appears that you have NOT disabled verify = sender (or one or more of
its variations) entirely.

ELSE not restarted Exim after editing the configure file.

Second - the sender verification process can return more than a simple pass/fail.

Well-covered in the docs, but not all in one place.

You may be able to use sender verify to at least confirm that sending MTA's
at-large exist and are configured to accept messages to (at least) 'postmaster'.

You may need to either reduce failure to a 'warn', adding a header or score for
later action, or stand ready to do a lot of whitelisting, as not all will verify
a specific user.

HTH,

Bill


Getting confirmation of specific 'other' user address validity is not all that
common.



--
## List details at http://www.exim.org/mailman/listinfo/exim-users
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://www.exim.org/eximwiki/
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