550 error


chomxxo.com
Asked:
2013-06-18 12:14 pm EST

Hits: 922
Getting a 550 error when attempting to send email to an email forwarder, lynn@lynngray.com (which forwards to ruttekin@gmail.com), from ed@thelodgeatthebluffs.com (pair.com). See below, please advise.

>
> -------- Original Message -------- Subject: Undelivered Mail Returned
> to Sender Date: 18.06.2013 10:03 From: MAILER-
> DAEMON@www1.webmail.pair.com (Mail Delivery System) To:
> ed@thelodgeatthebluffs.com
>
> This is the mail system at host www1.webmail.pair.com.
>
> I'm sorry to have to inform you that your message could not be
> delivered to one or more recipients. It's attached below.
>
> For further assistance, please send mail to postmaster.
>
> If you do so, please include this problem report. You can
> delete your own text from the attached returned message.
>
> The mail system
>
> <lynn@lynngray.com>: host lynngray.com[69.174.52.42] said: 550-
> Verification failed for <ed@thelodgeatthebluffs.com> 550-No Such User


> Here 550 Sender verify failed (in reply to RCPT TO command)

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0

Scott
Staff
20,848 Points
2013-06-18 1:07 pm EST
Hello chomxxo.com,

The line in your bounceback message that reads "Verification failed for 550-No Such User" is saying that the email address ed@thelodgeatthebluffs.com is invalid for the server that is receiving the email.

Although we do have an article describing the 'No Such User' error and what to do to correct it, the corrections need to be done on the server that is giving the error, which is the recipient.

If you have a way to contact the recipient, you may want to do that to see if the email address has changed or if they have an alternative one to which you can send.

Best Regards,
Scott M

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The recipient is lynn@lynngray.com, lynngray.com being hosted by me with Inmotionhosting.com. Please let me know what to do to correct this.
chomxxo.com
11 Points
2013-06-18 1:11 pm EST
Hello Chomxxo.com,

I just tested the user here and it's working with no problems. Were you sending the message yourself? Or was someone else sending it? One of the possibilities is remote mail settings are not configured correctly from the location sending the message. As per Scott's message above, the bounce that you have sent to us indicates that the USER "ed@thelodgeatthebluffs.com" is being detected as the user sending the message, but the server does not recognize him. I would recommend, he try a different user at that same location to see if it fixes the issue. If it doesn't, then they should review the settings for that location. Please review the article for the 550 error: Fixing the 550 error. Your forwarder is working as it should - we don't see any issues here.

Let us know if you have any further questions or concerns,

Arnel C.


Arn
18,399 Points
Staff
2013-06-18 5:49 pm EST
Both sides are claiming there is nothing you can do on your end. One of you is incorrect. Which is it? Let that side please provide a solution. Thank you.




---------- Forwarded message ----------
From: pair Networks Support <support@pair.com>
Date: Wed, Jun 19, 2013 at 1:41 PM
Subject: Re: [M6N4R7Q] whitelist lynn@lynngray.com
To: Lynn Gray <lynn@lynngray.com>


Hello,

Unfortunately there really is nothing we can do about this on our end. The error you provided, as well as the corresponding errors in our logs show the remote server rejecting mail this mail. Our server is passing it along properly, so we have no control over what the receiving server does. The message you
copied from the receiving host's support includes a link from their support documentation that actually confirms this, as well:

"If you get "550 No Such User Here" bounces sending from your server to another server, you most likely will need to contact the host or email administrator of the server you are emailing to fix it."

In this case they are the host of the server you are emailing, so their own documentation indicates they are the ones that should be contacted to correct this problem.

Thank You,

Josh
pair Networks, Inc.
support@pair.com

- pairNIC.com - $10 New Registration or Transfer - Code: JuneDeal2013
- Free Newsletter @ http://insider.pair.com/


>
> Lynn@lynngray.com accepts mail from all other addresses. Only Pair.com
> email gets rejected. This also happens for another client address,
> beth@thelodgeatthebluffs.com. Please take responsibility for the
> problem and let me know how to get it fixed. This is a problem with
> business communication between two clients; if we can't communicate,
> we can't do business. Thank you both in advance for taking action
> rather than passing blame.
>
> Sincerely,
> William Lynn Gray
> (225) 267-5858
>
>
> On Wed, Jun 19, 2013 at 12:13 AM, pair Networks Support
> <support@pair.com>wrote:
>
> > Hello,
> >
> > The problem here appears to be that you are sending mail as a user
> > at thelodgeatthebluffs.com to the remote addresses at lynngray.com,
> > but for some reason your mail client is also trying to authenticate
> > into the mail server at lynngray.com using your
> > thelodgeatthebluffs.com credentials. That's not necessary to do, nor
> > correct, so that's why the message is being rejected.
> >
> > I'm not sure why that's happening. Given that you're able to send to
> > all other addresses without any problems, then that indicates that
> > the problem is specific to the remote server handling mail for
> > lynngray.com.
> >
> > Best regards,
> > Mike S.
> > pair Networks, Inc.
> > support@pair.com
> > - pairNIC: Free Web & E-mail Forwarding - pairNIC.com
> > - More News @ http://www.pair.com/news/
> >
> >
> > >
> > > Inmotionhosting says its your problem, please see below
> > >
> > >
> > > Hi chomxxo.com,
> > >
> > > An answer posted about this question:
> > > 550 error
> > > ... has received the following comment:
> > >
> > > - - - - - - - - - - - - - - - - - - - - - - - -
> > > Hello Chomxxo.com,
> > >
> > > I just tested the user here and it's working with no problems.
> > > Were you sending the message yourself? Or was someone else sending
> > > it? One of the possibilities is remote mail settings are not
> > > configured correctly from the location sending the message. As per
> > > Scott's message above, the bounce that you have sent to us
> > > indicates that the USER "ed@thelodgeatthebluffs.com" is being
> > > detected as the user sending the message, but the server does not
> > > recognize him. I would recommend, he try a different user at that
> > > same location to see if it fixes the issue. If it doesn't, then
> > > they should review the settings for that location. Please review
> > > the article for the 550 error: <a href="
> > http://www.inmotionhosting.com/support/email/email-
> > > troubleshooting/fixing-no-such-user-here" target="new">Fixing the
> > > 550 error</a>. Your forwarder is working as it should - we don't
> > > see any issues here.
> > >
> > > Let us know if you have any further questions or concerns,
> > >
> > > Arnel C.
> >
chomxxo.com
11 Points
2013-06-19 3:21 pm EST
Hello Chomxxo.com

Sorry for all the email problems you've been having. I've come over from our system administration team to the customer community department, and have a lof of experience troubleshooting email bounce back issues, so hopefully I can shed some light on this problem for you.

The current issue that you're experiencing, appears to be from what we can tell, directly related to the mail server you are sending into our mail server from (www1.webmail.pair.com). I don't see any indication of this being a standard 550 email error indicating an unknown user.

It seems that this mail server that is attempting to send mail for (ed@thelodgeatthebluffs.com) is connecting to our mail server, and then attempting to do a sender verify for that same address. This fails because it is trying to force our mail server to verify an address that doesn't exist on our server, when it should be doing the sender verify check on their server, prior to reaching out to our server via SMTP (Simple Mail Transport Protocol).

After our server responds letting the remote server know the user doesn't exist, there is then a (RSET) command issued from the remote server closing the SMTP connection. This is what it looks like from the logs, I've replaced the remote mail server's IP with [x] and our IP with [IMH]


12:02:25 SMTP connection from [x] I=[IMH]:25 (TCP/IP connection count = 57)

12:02:25 H=www1.webmail.pair.com [x] I=[IMH]:25 Warning: Sender rate 1.9 / 1h

12:02:25 H=www1.webmail.pair.com [x] I=[IMH]:25 sender verify fail for <ed@thelodgeatthebluffs.com>: No Such User Here

12:02:25 H=www1.webmail.pair.com [x] I=[IMH]:25 F=<ed@thelodgeatthebluffs.com> rejected RCPT <lynn@lynngray.com>: Sender verify failed

12:02:25 H=www1.webmail.pair.com [x] I=[IMH]:25 incomplete transaction (RSET) from <ed@thelodgeatthebluffs.com>

12:02:25 SMTP connection from www1.webmail.pair.com [x] I=[IMH]:25 closed by QUIT


Here you can see what a normal SMTP connection looks like when sent from a standard mail server that is not encountering this issue, and you can see that it also forwards to the Gmail account successfully:


16:42:42 SMTP connection from [IMH-Office] I=[IMH]:25 (TCP/IP connection count = 31)

16:42:50 IMH 1UpPDN-0007Mn-13 <= support@inmotionhosting.com [IMH-Office]:50098 I=[IMH]:25 T="Test email, please disregard" for lynn@lynngray.com

16:42:50 SMTP connection from imh-srv.inmotionhosting.com [IMH-Office]:50098 I=[IMH]:25 closed by QUIT



16:42:51 1UpPDN-0007Mn-13 => ruttekin@gmail.com (lynn@lynngray.com) <lynn@lynngray.com> F=<support@inmotionhosting.com>

16:42:51 1UpPDN-0007Mn-13 Completed QT=2s


It's almost as if the remote mail server is attempting to use our server as an open mail relay, which it is not. Rather than queuing up the mail for delivery locally via a local MTA (Mail Transfer Agent) on their end, and then starting a SMTP session with our mail server to hand off the message.

Also I'd like to point out two important tidbits of info. When attempting to send mail to (ed@thelodgeatthebluffs.com) this domain has the MX (Mail Exchange) records set to mailwash48.pair.com for delivery. When I attempt a manual SMTP connection via telnet to this mail server, it temporarily rejects any delivery attempts for that address:


MAIL FROM:support@inmotionhosting.com

250 2.1.0 Ok

RCPT TO:ed@thelodgeatthebluffs.com

450 4.7.1 <ed@thelodgeatthebluffs.com>: Recipient address rejected: Service temporarily unavailable


A 450 email error indicates a temporarily delivery issue, typically relating to Greylisting. This is a practice of outright rejecting a message on its first delivery attempt, so that it will remain queued on the sending server and attempt delivery again at a later time. This is to deter spammers who aren't using a properly configured mail server that will attempt re-delivery attempts. This could possibly also be causing the strange communication problem between the two mail servers, but wouldn't be within our control to investigate or resolve from our end.

Also, you typically do not want to impose an extra unnecessary duplication of SMTP communication in your mail stream. I would HIGHLY recommend that you delete the email forwarder pointing to your Gmail account, and instead configure Gmail to check your POP3 account.

The difference is that if your LynnGray.com email address gets 100 spam messages sent to it, you are then forwarding those onto Gmail and their server sees our server as the last relaying IP address. That can eventually lead to a blacklisting or delay in deliveries, and other issues. If you instead are using Gmail as your online mail client, you can simply retrieve the messages from your LynnGray.com account via POP3 into Gmail. This is definitely the preferred method from both our own, and Google's perspective, and I POP in about 10 email accounts to my own Gmail without any issues at all.

I would recommend attempting to send to your email account from various other services other than Pair.com. If the general consensus is that they all work except for that one service, then I would assume it'd have to be something on their end causing the issues.

Please let us know what you find out, and hope that helps!

- Jacob
JacobIMH
9,968 Points
Staff
2013-06-19 5:35 pm EST
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