Outlook - Relay access denied'

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doo_much
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Outlook - Relay access denied'

Post by doo_much »

Interesting one.

Busy installing some software on a laptop and e-mailed the supplier from it.

Received the following message:
Your message did not reach some or all of the intended recipients.

Subject: License
Sent: 2012/01/26 03:40 PM

The following recipient(s) cannot be reached:

'Joseph Bloggs' on 2012/01/26 03:40 PM
Server error: '554 5.7.1 <jbloggs@somedomain.co.za>: Relay access denied'
Google says there is something wrong with the SMTP authentication (or something like that). Which is all good and well, but we haven't changed any of the settings on the client (Outlook).

The only thing that is different afaik is that the laptop normally connects via ADSL and here it is on my office LAN and connects through a shared 3G connection.

Can anyone shed some light on this?
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Re: Outlook - Relay access denied'

Post by Ron2K »

Your ADSL ISP's SMTP server is configured to only relay mail sent from the ISP's assigned IP address range, and disallow mails originating from anywhere else (such as your 3G provider's IP address range). Blame the countless e-mail spammers out there for this.

There's nothing you can do to "fix" this; you will need to send mail through an alternate SMTP server when on the 3G connection.

(There can be other causes of SMTP error 554, but from the information you provided, my answer is probably the most likely one.)
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Re: Outlook - Relay access denied'

Post by doo_much »

Thanks UberAdmin.
I have 2 other PCs on the LAN I can send mail with - and there's always my ISP's webinterface - so as I said, this is just interesting.
However.
After pressing the owner of the laptop a bit he admitted to having a message returned from another domain the other day with one of those 'you are sending us a virus' messages. Amazing what people will not tell you until they really need to isn't it? :lol:

Anyway. Another black mark behind Telscum's name then. What's teh use of having a laptop and you're unable to send e-mails from it?
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Re: Outlook - Relay access denied'

Post by Ron2K »

Ah -- in that case, disregard my previous guess.

I did some more research and it seems that Error 554 is typically caused by something in the From: or To: headers that the SMTP server doesn't like. (The IP thing I mentioned earlier would typically be connection timed out/refused, so please disregard my last answer, this is totally wrong!).

For example, take a look at these SMTP logs:

Code: Select all

Mon 2008-10-20 16:11:37: Session 7831; child 1; thread 3908
Mon 2008-10-20 16:11:36: Accepting SMTP connection from [80.78.72.135 : 43579]
Mon 2008-10-20 16:11:36: Performing PTR lookup (135.72.78.80.IN-ADDR.ARPA)
Mon 2008-10-20 16:11:36: *  Error: Name server reports domain name unknown
Mon 2008-10-20 16:11:36: *  No PTR records found
Mon 2008-10-20 16:11:36: ---- End PTR results
Mon 2008-10-20 16:11:36: --> 220 ikubinfo.com ESMTP MDaemon 9.5.2; Mon, 20 Oct 2008 16:11:36 +0200
Mon 2008-10-20 16:11:36:  250 ikubinfo.com Hello RS, pleased to meet you
Mon 2008-10-20 16:11:36: 
Mon 2008-10-20 16:11:36: Performing IP lookup (ikubINFO.com)
Mon 2008-10-20 16:11:36: *  D=ikubINFO.com TTL=(633) A=[216.75.60.232]
Mon 2008-10-20 16:11:36: *  P=010 S=000 D=ikubINFO.com TTL=(708) MX=[mail.ikubinfo.com]
Mon 2008-10-20 16:11:36: *  D=ikubINFO.com TTL=(633) A=[216.75.60.232]
Mon 2008-10-20 16:11:36: ---- End IP lookup results
Mon 2008-10-20 16:11:36: Performing SPF lookup (ikubINFO.com / 80.78.72.135)
Mon 2008-10-20 16:11:36: *  ikubINFO.com 80.78.72.135; matched to SPF cache
Mon 2008-10-20 16:11:36: *  Result: pass
Mon 2008-10-20 16:11:36: ---- End SPF results
Mon 2008-10-20 16:11:36: --> 250 , Sender ok
Mon 2008-10-20 16:11:36: 
Mon 2008-10-20 16:11:36: Performing DNS-BL lookup (80.78.72.135 - connecting IP)
Mon 2008-10-20 16:11:36: *  sbl-xbl.spamhaus.org - passed
Mon 2008-10-20 16:11:36: *  relays.ordb.org - failed
Mon 2008-10-20 16:11:36: *  bl.spamcop.net - passed
Mon 2008-10-20 16:11:36: ---- End DNS-BL results
Mon 2008-10-20 16:11:36: --> 250 , Recipient ok
Mon 2008-10-20 16:11:37:  354 Enter mail, end with .
Mon 2008-10-20 16:11:37: Message size: 389 bytes
Mon 2008-10-20 16:11:37: --> 554 Message does not conform to standards
Mon 2008-10-20 16:11:37:  221 See ya in cyberspace
Mon 2008-10-20 16:11:37: SMTP session terminated (Bytes in/out: 491/319)
In this case, the fact that the sender was on a DNS blacklist was the cause of the 554 error -- 554 is commonly used to tell blacklisted servers to voetsek. Now that you mention the whole virus thing, I wouldn't be at all surprised if the owner on the laptop somehow got on said blacklist.

Another cause would be the SMTP server not trusting the sender domain -- i.e. an MWEB SMTP server may be configured to only send the mails if the From: address is *@mweb.co.za and 554 anything else. Related to (but not the same as) my first hypothesis.
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Re: Outlook - Relay access denied'

Post by doo_much »

Oh vrek. :shock:

How does one confirm if he is on such a blacklist and how doe son eget him off?
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Re: Outlook - Relay access denied'

Post by Ron2K »

Does the bounce mail contain any other useful information?
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Re: Outlook - Relay access denied'

Post by doo_much »

Nada in the 'mooi' Outlook interface.

How the heck does one view the message source in Outlook 2010?

Help says 'Backstage Button' on file menu. I see no such thing...
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Re: Outlook - Relay access denied'

Post by doo_much »

Note how this has gone from 'interesting' to 'my problem'. :D


OK. Thanks Google. Enabled logging. And got this. Hope I didn't cut anything pertinent.
Does this shed any light for anyone?
---snip---
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): ===================================
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): Port: 110, Secure: no, SPA: no
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): Finding host
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): Connecting to host
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): Connected to host
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): <rx> +OK POP3 ready
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): Authorizing to server
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): [tx] CAPA
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): <rx> +OK Capability list follows
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): <rx> EXPIRE 31 USER
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): <rx> TOP
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): <rx> UIDL
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): <rx> USER
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): <rx> XOIP
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): <rx> SASL PLAIN
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): <rx> STLS
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): <rx> .
2012.01.26 17:36:25 POP3 (pop3.telkomsa.net): [tx] USER ************
2012.01.26 17:36:26 POP3 (pop3.telkomsa.net): <rx> +OK
2012.01.26 17:36:26 POP3 (pop3.telkomsa.net): [tx] PASS *****
2012.01.26 17:36:39 USERNAME@telkomsa.net: Synch operation started (flags = 00000001)
2012.01.26 17:36:39 USERNAME@telkomsa.net: UploadItems: 1 messages to send
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): Begin execution
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): Port: 25, Secure: no, SPA: no
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): Finding host
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): Connecting to host
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): Connected to host
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): <rx> 220 wblv-ip-mesg-1-1.saix.net ESMTP Postfix
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): [tx] EHLO ***** ///// WHAT THE HECK - EHLO???
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): <rx> 250-wblv-ip-mesg-1-1.saix.net
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): <rx> 250-PIPELINING
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): <rx> 250-SIZE 102400000
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): <rx> 250-ETRN
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): <rx> 250-ENHANCEDSTATUSCODES
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): <rx> 250-8BITMIME
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): <rx> 250 DSN
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): Authorized to host
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): Connected to host
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): [tx] MAIL FROM: <*****>
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): <rx> 250 2.1.0 Ok
2012.01.26 17:36:39 SMTP (smtp.dsl.telkomsa.net): [tx] RCPT TO: <*****>
2012.01.26 17:36:40 SMTP (smtp.dsl.telkomsa.net): <rx> 554 5.7.1 <*****>: Relay access denied
2012.01.26 17:36:40 SMTP (smtp.dsl.telkomsa.net): End execution
2012.01.26 17:36:40 USERNAME@telkomsa.net: ReportStatus: RSF_COMPLETED, hr = 0x00000000
2012.01.26 17:36:40 USERNAME@telkomsa.net: Synch operation completed
2012.01.26 17:36:41 POP3 (pop3.telkomsa.net): <rx> +OK server ready
2012.01.26 17:36:41 POP3 (pop3.telkomsa.net): Authorized to host
2012.01.26 17:36:41 POP3 (pop3.telkomsa.net): Connected to host

---snip---
MOOD - Thirsty

A surprising amount of modern pseudoscience is coming out of the environmental sector. Perhaps it should not be so surprising given that environmentalism is political rather than scientific.
Timothy Casey
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doo_much
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Re: Outlook - Relay access denied'

Post by doo_much »

Ron2K wrote:Ah -- in that case, disregard my previous guess.
Toe nie.

In this case it seems you guess was the cause. Laptop was connected to it's 'normal' ADSL yesterday and sends e-mails no problem.

So thanks UberAdmin and FAIL Telkom?
MOOD - Thirsty

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Re: Outlook - Relay access denied'

Post by RuadRauFlessa »

Oooh Doo, just for interest's sake.

You made a comment in the log next to the EHLO statement. This is the first command that an SMTP server expects from a client. There are actually a couple of flavors of SMTP in use and depending on the spelling of this, EHLO or HELO, the version in sue on the client side can be determined by the server.
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Re: Outlook - Relay access denied'

Post by doo_much »

Thx RRF.

One learns something new every day. Hope I never have need of the knowledge though!
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Re: Outlook - Relay access denied'

Post by RuadRauFlessa »

I had to... needed to code our own SMTP Relay server since the company I worked at at the time was too cheap and too lazy to either open up their current mail server as a relay from a single IP or to actually buy a decent solution.
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