Some Emails are Delayed

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This topic contains 12 replies, has 5 voices, and was last updated by Avatar theterranaut 7 years, 2 months ago.

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    papko
    Member
    #159345

    I installed exchange 2010 on windows server 2008 R2. All Roles except Unified Messaging are installed on the same Server.
    Sending of emails (externally and internally) is OK. Receiving internal e-mails is also OK. But some of messages (not all) send from external domains (for example yahoo.com) have been delayed. I have inspected this for one month but no luck.

    Can Somebody Help me ?

    Thank you in advance!

    Avatar
    Sembee
    Member
    #260852

    Re: Some Emails are Delayed

    What does the queue viewer say?
    Not enough information to go on really.

    Do you have a static IP address with everything setup correctly? PTR on the address, valid host name.

    Simon.

    Avatar
    theterranaut
    Member
    #386345

    Re: Some Emails are Delayed

    Sembee;261813 wrote:
    What does the queue viewer say?
    Not enough information to go on really.

    Do you have a static IP address with everything setup correctly? PTR on the address, valid host name.

    Simon.

    There is nothing at the queue viewer. Server is with static private address which in nat to our static public IP. And It has valid host name and PTR.

    Avatar
    Sembee
    Member
    #260855

    Re: Some Emails are Delayed

    If the queue viewer is clear then how do you know the messages are delayed?
    Although a delay doesn’t mean there is a problem with your server, it could be a problem with the remote server, a router in between you and the recipient. The only time a delay becomes a major issue is when it applies to all email.

    Simon.

    Avatar
    theterranaut
    Member
    #386346

    Re: Some Emails are Delayed

    ,”220 mail.mydomain.com Microsoft ESMTP MAIL Service ready at Thu, 19 Jul 2012 03:07:55 +0300″,
    < ,HELO omp1051.mail.bf1.yahoo.com,
    >,250 mail.mydomain.com Hello [98.139.212.242],
    < ,MAIL FROM:,
    *,08CF2E681009D6D7;2012-07-19T00:07:55.809Z;1,receiving message
    >,250 2.1.0 Sender OK,
    < ,RCPT TO:,
    >,250 2.1.5 Recipient OK,
    < ,DATA,
    >,354 Start mail input; end with .,
    -,,Remote

    This is part of receive connector log.
    And plenty messages like this appear all day long.

    Avatar
    theterranaut
    Member
    #386347

    Re: Some Emails are Delayed

    Hi. This is the qmail-send program at yahoo.com.
    I’m afraid I wasn’t able to deliver your message to the following addresses.
    This is a permanent error; I’ve given up. Sorry it didn’t work out.

    < [email protected]>:
    Connected to my.public.ip but connection died. (#4.4.2)
    I’m not going to try again; this message has been in the queue too long.

    This is message return to yahoo

    Avatar
    Sembee
    Member
    #260857

    Re: Some Emails are Delayed

    So this is INBOUND email, not OUTBOUND? It wasn’t clear from your original question.

    The error is usually caused by a networking issue, something with the router configuration, wrong default gateway, something scanning SMTP traffic which it shouldn’t be etc.

    Simon.

    Avatar
    theterranaut
    Member
    #386348

    Re: Some Emails are Delayed

    Sembee;261874 wrote:
    So this is INBOUND email, not OUTBOUND? It wasn’t clear from your original question.

    The error is usually caused by a networking issue, something with the router configuration, wrong default gateway, something scanning SMTP traffic which it shouldn’t be etc.

    Simon.

    YES it’s INBOUND email. Excuse me for unclear question.
    The thing that confuse me is that this happens with some inbound emails. Not with all.

    Avatar
    Sembee
    Member
    #260859

    Re: Some Emails are Delayed

    The problem is, as the recipient, until the message is delivered to your server, it is under your control and there is very little that you can do.
    These kinds of issues are usually network related, as per my previous postings. There is no “magic” fix that will correct the issue quickly and easily, unless you find something that is configured incorrectly.

    The EXBPA (in the toolbox) might flag something.

    Simon.

    Avatar
    mrbostn
    Member
    #283386

    Re: Some Emails are Delayed

    Go here http://www.mxtoolbox.com/
    Then here https://www.testexchangeconnectivity.com/

    Avatar
    AndyJG247
    Member
    #323265

    Re: Some Emails are Delayed

    I get the impression the emails hit you and then fail from the below?

    Do you have file and/or Exchange AV on the server and is it setup with the correct exclusions etc.
    Have you checked basic stuff like duplex mismatches on the server/switch/firewall/router?
    What is the physical setup? Server – – switch — firewall — router etc?
    If you open an smtp connection to your server and leave it open does it drop unexpectedly?

    Avatar
    theterranaut
    Member
    #386349

    Re: Some Emails are Delayed

    AndyJG247;261903 wrote:
    I get the impression the emails hit you and then fail from the below?

    Do you have file and/or Exchange AV on the server and is it setup with the correct exclusions etc.
    Have you checked basic stuff like duplex mismatches on the server/switch/firewall/router?
    What is the physical setup? Server – – switch — firewall — router etc?
    If you open an smtp connection to your server and leave it open does it drop unexpectedly?

    Yes I have Exchange AV. But I turn it off and nothing change. The physical setup is exactly the same as told.

    I’ ll check for duplex mismatches .
    What do you mean with last question ? Open SMTP session using telnet or something else ?

    Avatar
    AndyJG247
    Member
    #323269

    Re: Some Emails are Delayed

    Off still leaves remnants unfortunately so isn’t a complete test.
    What about file level as well?

    yeah telnet externally to your public IP on port 25 and let it sit for a bit (it will eventually drop after a timeout but this should be a regular time period.

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