mail problem?
Jeremy Nicoll - news posts
today was returned undeliverable to me with the message shown below (in
which I've xxx-ed out some of the values):
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
k...@xxxxxxxx.co.uk
SMTP error from remote mail server after RCPT TO:<k...@xxxxxxxx.co.uk>:
host mailgate.freeparking.com [72.1.xxx.xxx]:
550-Verification failed for <yaho...@wingsandbeaks.org.uk>
550-Unrouteable address
550 Sender verify failed
Am I right in saying that this (probably) means that BY's mail daemon looked
up something (in DNS?) to see if "yaho...@wingsandbeaks.org.uk" is a valid
address, or at least, to see if "wingsandbeaks.org.uk" is a properly hosted
domain?
If so, is there anything wrong with the DNS records (which A&A defined) for
"wingsandbeaks.org.uk"? The error message's 'date' header was:
Sat, 26 Dec 2009 12:08:55 +0000
--
Jeremy C B Nicoll - my opinions are my own.
Email sent to my from-address will be deleted. Instead, please reply
to newsre...@wingsandbeaks.org.uk replacing "nnn" by "284".
Dominic Hargreaves
> I send mails via blueyonder's smtp server. One I tried to send earlier
> today was returned undeliverable to me with the message shown below (in
> which I've xxx-ed out some of the values):
>
>
> A message that you sent could not be delivered to one or more of its
> recipients. This is a permanent error. The following address(es) failed:
>
> k...@xxxxxxxx.co.uk
> SMTP error from remote mail server after RCPT TO:<k...@xxxxxxxx.co.uk>:
> host mailgate.freeparking.com [72.1.xxx.xxx]:
> 550-Verification failed for <yaho...@wingsandbeaks.org.uk>
> 550-Unrouteable address
> 550 Sender verify failed
>
>
> Am I right in saying that this (probably) means that BY's mail daemon looked
> up something (in DNS?) to see if "yaho...@wingsandbeaks.org.uk" is a valid
> address, or at least, to see if "wingsandbeaks.org.uk" is a properly hosted
> domain?
>
> If so, is there anything wrong with the DNS records (which A&A defined) for
> "wingsandbeaks.org.uk"? The error message's 'date' header was:
The DNS contains a single MX record for B.secondary-mx.co.uk. I don't
know about A&A's mail setup, but when I tested just now I got:
telnet B.secondary-mx.co.uk 25
Trying 2001:8b0:0:81::51bb:510c...
Connected to B.secondary-mx.co.uk.
Escape character is '^]'.
450 Temporary unavailable - try later
Connection closed by foreign host.
when connecting to B.secondary-mx.co.uk. It's quite likely that
mailgate.freeparking.com tried sender callout verification, where the
MTA tries to determine whether the sender address is valid by connecting
to the listed mail servers and trying an RCPT TO command (and then
disconnecting). If the server received the temporary error above when
doing this, it shouldn't have returned a permanent error itself, but
it's possible that it did. On the other hand, if when it connected it
got further than I did, and determined that yaho...@wingsandbeaks.org.uk
was not a valid address, it would be understandable if it rejected the
post, to avoid the potential to deal with undeliverable bounces later
on.
I tried again just now and got:
RCPT TO:<yaho...@wingsandbeaks.org.uk>
250 OK
which suggests that, unless that address has been created very recently,
the server mailgate.freeparking.com was in error to return a permanent
error in response to a 450.
This is still conjecture, since the SMTP response doesn't give
enough detail to fully diagnose the behaviour, so it would probably be
best to email postm...@freeparking.com to ask them on what basis they
made their "Unroutable address" decision. Feel free to use any of this
response in your enquiry.
Cheers,
Dominic.
--
Dominic Hargreaves | http://www.larted.org.uk/~dom/
PGP key 5178E2A5 from the.earth.li (keyserver,web,email)
Jeremy Nicoll - news posts
Dominic Hargreaves <d...@earth.li> wrote:
> Jeremy Nicoll - news posts <jn.nntp....@wingsandbeaks.org.uk> wrote:
> > If so, is there anything wrong with the DNS records (which A&A defined)
> > for "wingsandbeaks.org.uk"? The error message's 'date' header was:
>
> The DNS contains a single MX record for B.secondary-mx.co.uk. I don't
> know about A&A's mail setup, but when I tested just now I got:
>
> telnet B.secondary-mx.co.uk 25
> Trying 2001:8b0:0:81::51bb:510c...
> Connected to B.secondary-mx.co.uk.
> Escape character is '^]'.
> 450 Temporary unavailable - try later
> Connection closed by foreign host.
>
> when connecting to B.secondary-mx.co.uk.
Oh dear, maybe it drank too much at the Christmas Eve party!
> If the server received the temporary error above when doing this, it
> shouldn't have returned a permanent error itself, but it's possible that
> it did.
I'm guessing so.... because
> On the other hand, if when it connected it got further than I did,
> and determined that yaho...@wingsandbeaks.org.uk was not a valid
> address,
... there's no way to determine that. None of the addresses I use at that
domain are defined on A&A's system.
> I tried again just now and got:
>
> RCPT TO:<yaho...@wingsandbeaks.org.uk>
> 250 OK
>
> which suggests that, unless that address has been created very recently,
Nope, it's been in use for months.
> the server mailgate.freeparking.com was in error to return a permanent
> error in response to a 450.
>
> This is still conjecture, since the SMTP response doesn't give
> enough detail to fully diagnose the behaviour, so it would probably be
> best to email postm...@freeparking.com to ask them on what basis they
> made their "Unroutable address" decision.
I will...
> Feel free to use any of this response in your enquiry.
Thanks again!
Rodney Pont
>If so, is there anything wrong with the DNS records (which A&A defined) for
>"wingsandbeaks.org.uk"? The error message's 'date' header was:
I've tried 'host wingsandbeaks.org.uk' which failed, as I think it
should since it's the domain and not an actual system.
I'd expect wingsandbeaks.org.uk to have an MX record which in turn
points to an email server with an A+reverse record.
What do you have setup for the MX record for wingsandbeaks.org.uk?
--
Regards - Rodney Pont
The from address exists but is mostly dumped,
please send any emails to the address below
e-mail ngpsm4 (at) infohitsystems (dot) ltd (dot) uk
Chris King
> On Sat, 26 Dec 2009 23:31:18 +0000, Jeremy Nicoll - news posts wrote:
>
>>If so, is there anything wrong with the DNS records (which A&A defined) for
>>"wingsandbeaks.org.uk"? The error message's 'date' header was:
>
> I've tried 'host wingsandbeaks.org.uk' which failed, as I think it
> should since it's the domain and not an actual system.
>
> I'd expect wingsandbeaks.org.uk to have an MX record which in turn
> points to an email server with an A+reverse record.
>
> What do you have setup for the MX record for wingsandbeaks.org.uk?
Jeremy
I've just run a DNSstuff report for wingsandbeaks.org.uk, the results
can be found (for the next seven days) at:
According to the report, there's one MX record for the domain,
b.secondary-mx.co.uk, which resolves to b.hopeless - and that's giving a
"450 Temporary unavailable - try later" error when you connect to it.
However, making a connection to wingsandbeaks.org.uk.secondary-mx.co.uk
seems to work - even though it resolves to the same IP address.
Chris
--
Chris King
(firstname@domain to reply by e-mail - or your message gets binned)
Jeremy Nicoll - news posts
> I've just run a DNSstuff report for wingsandbeaks.org.uk,
Thanks very much; that looks like a useful resource - I particularly like
the way they comment on the implication of each test result.
> According to the report, there's one MX record for the domain,
> b.secondary-mx.co.uk, which resolves to b.hopeless - and that's giving a
> "450 Temporary unavailable - try later" error when you connect to it.
>
> However, making a connection to wingsandbeaks.org.uk.secondary-mx.co.uk
> seems to work - even though it resolves to the same IP address.
I suppose/hope that this needs someone at A&A to comment?
Jeremy Nicoll - news posts
> What do you have setup for the MX record for wingsandbeaks.org.uk?
Whatever A&A defined for me. I've never changed any of it.
David Lord
>
>> What do you have setup for the MX record for wingsandbeaks.org.uk?
>
> Whatever A&A defined for me. I've never changed any of it.
>
I've just tried and get same 450 try later.
telnet b.secondary-mx.co.uk 25
Trying 81.187.81.12
Connected to b.secondary-mx.co.uk.
Escape character is '^]'.
450 Temporary unavailable - try later
Connection closed by foreign host.
I'm on C.secondary-mx.co.uk that is accepting connections.
David
James Beck (AAISP)
Hash: SHA1
David Lord wrote:
> telnet b.secondary-mx.co.uk 25
> Trying 81.187.81.12
> Connected to b.secondary-mx.co.uk.
> Escape character is '^]'.
> 450 Temporary unavailable - try later
> Connection closed by foreign host.
The A and B mail servers have always had a basic greylisting - if you
wait a minute and then connect again, it should work.
> mailgate.freeparking.com tried sender callout verification, where the
> MTA tries to determine whether the sender address is valid by connecting
> to the listed mail servers and trying an RCPT TO command (and then
> disconnecting). If the server received the temporary error above when
> doing this, it shouldn't have returned a permanent error itself, but
> it's possible that it did.
I think this sounds quite likely, Dominic.
Jeremy, in order to avoid this greylisting, it would be best to move to
the C mail server. Although the C mail server employs greylisting, it
only dos so for emails that it believes to be spam. It probably won't be
a quick upgrade, looking at your mail setup. If you want to move to C,
can you email support please?
It does sound like mailgate.freeparking.com is doing something wrong,
because it shouldn't return a permanent error, as Dominic says.
- --
James Beck
AAISP Technical Support Assistant Team Leader
Tel: 03333 400999
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Jeremy Nicoll - news posts
> The A and B mail servers have always had a basic greylisting - if you
> wait a minute and then connect again, it should work.
Ah, greylisting is something I'd forgotten about, though I think I thought
users had to choose whether they wanted it used?
> > If the server received the temporary error above when doing this, it
> > shouldn't have returned a permanent error itself, but it's possible that
> > it did.
>
> I think this sounds quite likely, Dominic.
I will follow this up with them, but I also thought it worth finding out
what A&A's position on this was first.
> Jeremy, in order to avoid this greylisting, it would be best to move to
> the C mail server. Although the C mail server employs greylisting, it
> only dos so for emails that it believes to be spam. It probably won't be
> a quick upgrade, looking at your mail setup. If you want to move to C,
> can you email support please?
I have always expected that using C may be ok after the transition's been
made - and indeed I'll be glad when I have done so and can also use webmail
- but it might be a problem getting through the transition.
I do have a couple of sub-domains assigned to C but haven't yet done enough
experimenting to see what all the implications are for my way of using
email. (Currently I have nearly 300 separate email addresses in use, and I
do not want mail for any of them to disappear into a hole. I expect my use
of separate addresses to continue to rise.)
> It does sound like mailgate.freeparking.com is doing something wrong,
> because it shouldn't return a permanent error, as Dominic says.
Thanks for your confirmation of this!