Remote server response was not rfc conformant

Hii folks, I have an issue with Exchange 2010 outbound mails.
Mails of some domains stuck in  the queue with error "remote server response was not rfc conformant"
Appreciate your responds.

Hi,
According to your description, This issue is related to one of your clients. And I’d like to confirm if emails from the problematic user are stuck in the queue and other emails are delivered successfully.
If yes, I’d like to also confirm the version of the problematic user. Is it Exchange account? External user or internal user? Does it belong to a distribution group?
Additionally, I recommend to check the SMTP protocol log:
Understanding Protocol Logging:
http://technet.microsoft.com/en-us/library/aa997624(v=exchg.141).aspx
Configure Protocol Logging:
http://technet.microsoft.com/en-us/library/bb124531(v=exchg.141).aspx
Thanks,
Angela Shi
TechNet Community Support

Similar Messages

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     try
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                    SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
                    mail.From = new MailAddress("[email protected]");
                    mail.To.Add("[email protected]");
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                    mail.Body = "mail with attachment";
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        The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.
    Bikky Kumar

     try
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                    SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
                    mail.From = new MailAddress("[email protected]");
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                    mail.Subject = "Test Mail..!!!!";
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    Solution:
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    case 1: when the password is wrong
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  • Aironet 1600 - A response was not received from the router or access point

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    Connection started at: 2015-02-17 09:55:49-951
    Profile match: Success
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    Association: Fail
    Security and Authentication: Not started
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    Detailed root cause:
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    The signal is perfect (I'm only a few feet away from the AP).
    To make sure there is no dhcp problem I tested the swich port in access mode for vlan 30 which supplied an IP correctly. I'm really not seeing the problem and searched the web for days now! Any help would be very much appreciated! 
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    version 15.2
    no service pad
    service timestamps debug datetime msec
    service timestamps log datetime msec localtime show-timezone
    service password-encryption
    hostname AP002-C
    logging rate-limit console 9
    enable secret 5 $1$Bxv3$Of8o5..8v6gzIiAe2tXlh/
    no aaa new-model
    no ip cef
    dot11 syslog
    dot11 vlan-name Windekind.Directie vlan 50
    dot11 vlan-name Windekind.Gast vlan 30
    dot11 vlan-name Windekind.Klasnet vlan 40
    dot11 ssid Windekind.Directie
    vlan 50
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    authentication open
    mobility network-id 50
    dot11 ssid Windekind.Gast
    vlan 30
    band-select
    authentication open
    authentication key-management wpa version 2
    mbssid guest-mode
    mobility network-id 30
    wpa-psk ascii 7 14201B05080121222A2C6A6D63
    dot11 ssid Windekind.Klasnet
    vlan 40
    band-select
    mobility network-id 40
    crypto pki token default removal timeout 0
    username Cisco password 7 112A1016141D
    bridge irb
    interface Dot11Radio0
    no ip address
    no ip route-cache
    encryption vlan 30 mode ciphers aes-ccm tkip
    ssid Windekind.Directie
    ssid Windekind.Gast
    ssid Windekind.Klasnet
    antenna gain 2
    stbc
    beamform ofdm
    mbssid
    speed basic-1.0 2.0 5.5 11.0 6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15.
    channel 2452
    no preamble-short
    station-role root
    payload-encapsulation dot1h
    bridge-group 1
    bridge-group 1 subscriber-loop-control
    bridge-group 1 block-unknown-source
    no bridge-group 1 source-learning
    no bridge-group 1 unicast-flooding
    interface Dot11Radio0.30
    encapsulation dot1Q 30
    no ip route-cache
    bridge-group 30
    bridge-group 30 subscriber-loop-control
    bridge-group 30 spanning-disabled
    bridge-group 30 block-unknown-source
    no bridge-group 30 source-learning
    no bridge-group 30 unicast-flooding
    interface Dot11Radio0.40
    encapsulation dot1Q 40
    no ip route-cache
    bridge-group 40
    bridge-group 40 subscriber-loop-control
    bridge-group 40 spanning-disabled
    bridge-group 40 block-unknown-source
    no bridge-group 40 source-learning
    no bridge-group 40 unicast-flooding
    interface Dot11Radio0.50
    encapsulation dot1Q 50
    no ip route-cache
    bridge-group 50
    bridge-group 50 subscriber-loop-control
    bridge-group 50 spanning-disabled
    bridge-group 50 block-unknown-source
    no bridge-group 50 source-learning
    no bridge-group 50 unicast-flooding
    interface Dot11Radio1
    no ip address
    no ip route-cache
    encryption vlan 30 mode ciphers aes-ccm tkip
    ssid Windekind.Directie
    ssid Windekind.Gast
    ssid Windekind.Klasnet
    antenna gain 4
    no dfs band block
    stbc
    beamform ofdm
    mbssid
    speed basic-6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15.
    channel dfs
    station-role root
    payload-encapsulation dot1h
    bridge-group 1
    bridge-group 1 subscriber-loop-control
    bridge-group 1 block-unknown-source
    no bridge-group 1 source-learning
    no bridge-group 1 unicast-flooding
    interface Dot11Radio1.30
    encapsulation dot1Q 30
    no ip route-cache
    bridge-group 30
    bridge-group 30 subscriber-loop-control
    bridge-group 30 spanning-disabled
    bridge-group 30 block-unknown-source
    no bridge-group 30 source-learning
    no bridge-group 30 unicast-flooding
    interface Dot11Radio1.40
    encapsulation dot1Q 40
    no ip route-cache
    bridge-group 40
    bridge-group 40 subscriber-loop-control
    bridge-group 40 spanning-disabled
    bridge-group 40 block-unknown-source
    no bridge-group 40 source-learning
    no bridge-group 40 unicast-flooding
    interface Dot11Radio1.50
    encapsulation dot1Q 50
    no ip route-cache
    bridge-group 50
    bridge-group 50 subscriber-loop-control
    bridge-group 50 spanning-disabled
    bridge-group 50 block-unknown-source
    no bridge-group 50 source-learning
    no bridge-group 50 unicast-flooding
    interface GigabitEthernet0
    no ip address
    no ip route-cache
    duplex auto
    speed auto
    bridge-group 1
    bridge-group 1 spanning-disabled
    no bridge-group 1 source-learning
    interface GigabitEthernet0.30
    encapsulation dot1Q 30
    no ip route-cache
    bridge-group 30
    bridge-group 30 spanning-disabled
    no bridge-group 30 source-learning
    interface GigabitEthernet0.40
    encapsulation dot1Q 40
    no ip route-cache
    bridge-group 40
    bridge-group 40 spanning-disabled
    no bridge-group 40 source-learning
    interface GigabitEthernet0.50
    encapsulation dot1Q 50
    no ip route-cache
    bridge-group 50
    bridge-group 50 spanning-disabled
    no bridge-group 50 source-learning
    interface BVI1
    ip address 10.0.0.81 255.255.255.0
    no ip route-cache
    ip default-gateway 10.0.0.1
    ip forward-protocol nd
    ip http server
    no ip http secure-server
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    line con 0
    line vty 0 4
    login local
    transport input all
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    Hi Rasika
    thanks for the reply! 10.0.0.81 belongs to vlan 1. I changed the config as suggested but no luck.. (same problems are logged in the event viewer). the ap is connected to a switchport in trunk mode and vlan 1 is the native lan (untagged). the port also is joined to vlan 30 (and others).
    Below the new config. Hope you can see an error..
    ! Last configuration change at 22:56:10 UTC Thu Apr 1 1993
    version 15.2
    no service pad
    service timestamps debug datetime msec
    service timestamps log datetime msec localtime show-timezone
    service password-encryption
    hostname AP002-C
    logging rate-limit console 9
    enable secret 5 $1$Bxv3$Of8o5..8v6gzIiAe2tXlh/
    no aaa new-model
    no ip cef
    dot11 syslog
    dot11 vlan-name Default vlan 1
    dot11 vlan-name Windekind.Directie vlan 50
    dot11 vlan-name Windekind.Gast vlan 30
    dot11 vlan-name Windekind.Klasnet vlan 40
    dot11 ssid Windekind.Directie
       vlan 50
       band-select
       authentication open
       mobility network-id 50
    dot11 ssid Windekind.Gast
       vlan 30
       band-select
       authentication open
       authentication key-management wpa version 2
       mbssid guest-mode
       mobility network-id 30
       wpa-psk ascii 7 14201B05080121222A2C6A6D63
    dot11 ssid Windekind.Klasnet
       vlan 40
       band-select
       mobility network-id 40
    crypto pki token default removal timeout 0
    username Cisco password 7 112A1016141D
    bridge irb
    interface Dot11Radio0
     no ip address
     no ip route-cache
     encryption vlan 30 mode ciphers aes-ccm tkip
     ssid Windekind.Directie
     ssid Windekind.Gast
     ssid Windekind.Klasnet
     antenna gain 2
     stbc
     beamform ofdm
     mbssid
     speed  basic-1.0 2.0 5.5 11.0 6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15.
     no preamble-short
     channel 2452
     station-role root
     payload-encapsulation dot1h
    interface Dot11Radio0.1
     encapsulation dot1Q 1 native
     no ip route-cache
     bridge-group 1
     bridge-group 1 subscriber-loop-control
     bridge-group 1 spanning-disabled
     bridge-group 1 block-unknown-source
     no bridge-group 1 source-learning
     no bridge-group 1 unicast-flooding
    interface Dot11Radio0.30
     encapsulation dot1Q 30
     no ip route-cache
     bridge-group 30
     bridge-group 30 subscriber-loop-control
     bridge-group 30 spanning-disabled
     bridge-group 30 block-unknown-source
     no bridge-group 30 source-learning
     no bridge-group 30 unicast-flooding
    interface Dot11Radio0.40
     encapsulation dot1Q 40
     no ip route-cache
     bridge-group 40
     bridge-group 40 subscriber-loop-control
     bridge-group 40 spanning-disabled
     bridge-group 40 block-unknown-source
     no bridge-group 40 source-learning
     no bridge-group 40 unicast-flooding
    interface Dot11Radio0.50
     encapsulation dot1Q 50
     no ip route-cache
     bridge-group 50
     bridge-group 50 subscriber-loop-control
     bridge-group 50 spanning-disabled
     bridge-group 50 block-unknown-source
     no bridge-group 50 source-learning
     no bridge-group 50 unicast-flooding
    interface Dot11Radio1
     no ip address
     no ip route-cache
     encryption vlan 30 mode ciphers aes-ccm tkip
     ssid Windekind.Directie
     ssid Windekind.Gast
     ssid Windekind.Klasnet
     antenna gain 4
     no dfs band block
     stbc
     beamform ofdm
     mbssid
     speed  basic-6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15.
     channel dfs
     station-role root
     payload-encapsulation dot1h
    interface Dot11Radio1.1
     encapsulation dot1Q 1 native
     no ip route-cache
     bridge-group 1
     bridge-group 1 subscriber-loop-control
     bridge-group 1 spanning-disabled
     bridge-group 1 block-unknown-source
     no bridge-group 1 source-learning
     no bridge-group 1 unicast-flooding
    interface Dot11Radio1.30
     encapsulation dot1Q 30
     no ip route-cache
     bridge-group 30
     bridge-group 30 subscriber-loop-control
     bridge-group 30 spanning-disabled
     bridge-group 30 block-unknown-source
     no bridge-group 30 source-learning
     no bridge-group 30 unicast-flooding
    interface Dot11Radio1.40
     encapsulation dot1Q 40
     no ip route-cache
     bridge-group 40
     bridge-group 40 subscriber-loop-control
     bridge-group 40 spanning-disabled
     bridge-group 40 block-unknown-source
     no bridge-group 40 source-learning
     no bridge-group 40 unicast-flooding
    interface Dot11Radio1.50
     encapsulation dot1Q 50
     no ip route-cache
     bridge-group 50
     bridge-group 50 subscriber-loop-control
     bridge-group 50 spanning-disabled
     bridge-group 50 block-unknown-source
     no bridge-group 50 source-learning
     no bridge-group 50 unicast-flooding
    interface GigabitEthernet0
     no ip address
     no ip route-cache
     duplex auto
     speed auto
    interface GigabitEthernet0.1
     encapsulation dot1Q 1 native
     no ip route-cache
     bridge-group 1
     bridge-group 1 spanning-disabled
     no bridge-group 1 source-learning
    interface GigabitEthernet0.30
     encapsulation dot1Q 30
     no ip route-cache
     bridge-group 30
     bridge-group 30 spanning-disabled
     no bridge-group 30 source-learning
    interface GigabitEthernet0.40
     encapsulation dot1Q 40
     no ip route-cache
     bridge-group 40
     bridge-group 40 spanning-disabled
     no bridge-group 40 source-learning
    interface GigabitEthernet0.50
     encapsulation dot1Q 50
     no ip route-cache
     bridge-group 50
     bridge-group 50 spanning-disabled
     no bridge-group 50 source-learning
    interface BVI1
     ip address 10.0.0.81 255.255.255.0
     no ip route-cache
    ip default-gateway 10.0.0.1
    ip forward-protocol nd
    ip http server
    no ip http secure-server
    ip http help-path http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag
    logging facility user
    bridge 1 route ip
    line con 0
    line vty 0 4
     login local
     transport input all
    end
    t

  • Can't send emails. The server response was: 1060208403.

    Nobody in my office can send emails today. All eight of us can access the Internet and send emails normally on our computers.
    When attempting to send a message I get the following error message:
    Cannot send message using the server mail.ourserver.org
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