Mailing List Archive: 'Could not complete sender verify'

'Could not complete sender verify'

exim-users at exim

Nov 23, 2021, 5:39 AM

Post #1 of 6 (582 views)

When arthurbanana@gmail.com sends a message to
fred@123.456.789.012 exim undelivers the message and logs:

2021-11-23 04:41:56.239 [23354] H=mail-oi1-f171.google.com [209.85.167.171]:47047 I=[123.456.789.012]:25 sender verify defer for <arthurbanana@gmail.com>: host lookup did not complete
2021-11-23 04:41:56.239 [23354] H=mail-oi1-f171.google.com [209.85.167.171]:47047 I=[123.456.789.012]:25 X=TLS1.2:ECDHE-RSA-AES128-GCM-SHA256:128 CV=no F=<arthurbanana@gmail.com> temporarily rejected RCPT <fred@123.456.789.012>: Could not complete sender verify
2021-11-23 04:41:56.272 [23354] H=mail-oi1-f171.google.com [209.85.167.171]:47047 I=[123.456.789.012]:25 incomplete transaction (QUIT) from <arthurbanana@gmail.com>
2021-11-23 04:41:56.273 [23354] SMTP connection from mail-oi1-f171.google.com [209.85.167.171]:47047 I=[123.456.789.012]:25 closed by QUIT

What does this mean? Does it mean that exim (which serves
123.456.789.012) can't verify arthurbanana@gmail.com?

russell bell

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

Re: 'Could not complete sender verify' [ In reply to ]

exim-users at exim

Nov 24, 2021, 5:56 AM

Post #2 of 6 (582 views)

On Tue, Nov 23, 2021 at 06:39:04AM -0700, Ben Franklin via Exim-users wrote:
> 2021-11-23 04:41:56.239 [23354] H=mail-oi1-f171.google.com [209.85.167.171]:47047 I=[123.456.789.012]:25 sender verify defer for <arthurbanana@gmail.com>: host lookup did not complete
...
> What does this mean? Does it mean that exim (which serves
> 123.456.789.012) can't verify arthurbanana@gmail.com?

Yes, message "host lookup did not complete" means Exim did not get answers
from DNS for "gmail.com". So it could not proceed with sender verification.
--
Eugene Berdnikov

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

Re: 'Could not complete sender verify' [ In reply to ]

exim-users at exim

Nov 24, 2021, 6:58 AM

Post #3 of 6 (582 views)

Quoth Eugene Berdnikov: 'message "host lookup did not
complete" means Exim did not get answers from DNS for "gmail.com". So
it could not proceed with sender verification.'
How can Exim not resolve DNS for gmail.com?

russell bell

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

Re: 'Could not complete sender verify' [ In reply to ]

exim-users at exim

Nov 24, 2021, 8:26 AM

Post #4 of 6 (582 views)

On Wed, Nov 24, 2021 at 07:58:29AM -0700, Ben Franklin via Exim-users wrote:
> Quoth Eugene Berdnikov: 'message "host lookup did not
> complete" means Exim did not get answers from DNS for "gmail.com". So
> it could not proceed with sender verification.'
> How can Exim not resolve DNS for gmail.com?

Did you read a statement on which you wrote reply? Try again.
--
Eugene Berdnikov

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

Re: 'Could not complete sender verify' [ In reply to ]

exim-users at exim

Nov 25, 2021, 6:26 AM

Post #5 of 6 (582 views)

Quoth Eugene Berdnikov: 'Did you read a statement on which you
wrote reply? Try again.'
I don't understand your question. I read your first reply. I
quoted it. In it you wrote, 'Exim did not get answers from DNS for
"gmail.com".' Every other Internet protocol client can get gmail.com
resolved on that domain. I don't see how exim can't.

russell bell

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

Re: 'Could not complete sender verify' [ In reply to ]

exim-users at exim

Nov 25, 2021, 7:32 AM

Post #6 of 6 (582 views)

On 25 Nov 2021, at 14:26, Ben Franklin via Exim-users <exim-users@exim.org> wrote:
> Quoth Eugene Berdnikov: 'Did you read a statement on which you
> wrote reply? Try again.'

You have a very unusual quoting method which some people may find difficult to follow.

> I don't understand your question. I read your first reply. I
> quoted it. In it you wrote, 'Exim did not get answers from DNS for
> "gmail.com".' Every other Internet protocol client can get gmail.com
> resolved on that domain. I don't see how exim can’t

At the time of processing that inbound message, the DNS lookup that exim passed to your system resolver timed out. Therefore, exim couldn’t verify the incoming address, so rejected it. Maybe the upstream resolver was rebooting, or something was overloaded, or slow.

Graeme