Hello,

When sending mail from exchange 2013 to exchange 2007 using SMTP relay to mailbox delivery group, mails stuck in queue with the error:

 [{LRT=5/12/2015 6:03:24 AM};{LED=451 4.4.0 Primary target IP address responded
 with: "235 00000734YIIFYgYJKoZIhvcSAQICAQBuggVRMIIFTaADAgEFoQMCAQ6iBwMFAAAAAACjggQJY
 YIEBTCCBAGgAwIBBaEOGwxDT01WRVJTRS5DT02iLjAsoAMCAQKhJTAjGwdTTVRQU1ZDGxhVUy1ETlYtTUJYM
 i5jb212ZXJzZS5jb22jggO4MIIDtKADAgEXoQMCAQKiggOmBIIDop6UphxXPkD6/d/XwUsUhRj5/X2JXeFxo
 0EmvOhRJ+G5xb4tHnHk0R9m0vyKgbYT9FqOeMjcMw75E6P2SDNsLbpRbG9JwfJQtfhN+R5qNnFh1fhDFOT/x
 JgPCZSUizubYaEDB+eJoeppedCXNwfoAm24EAjPKMAi6kp+G0FbjBHQIT/HN5d6AHP76kOWZg9w0gk89Chmy
 1WGZ4GwraDr02S6AYBLKlrBWsNxo1Hdj0ZeKyD20kEukTxrpTbDxbU7Mtw8y1wMCrjTiO7mgS4EeUrUEJWCp
 fBiR3aOfvP+PDHBCNIb3djENseRhdBHCx6zi4N0mjuy1K11o6P1w6YoSe+GF3YrIAJT3yYHYLfY1b6xr6g50
 RH5wSNqnmUtPaWJidXXgNvPUZtZBKiTwCZs2TsuzEYoYT944prLHvL4KUekMFzMEA2oyb4RkrvBjBckQ0kHj
 4YGR7YYaFBs16arMrI7ZJiB+PYCdDOFfZb3A0WyMeCfcl26GAKFVq38LlKl0DyybkTIS4S3eVCTf7ji+APZX
 iG1P1BicwKPscbkhyPNBOGqnnIog9dCHqfjT3hiU6CX+iW8HzBAkrAyH02rU80ftCpoei+D2ZVYkWtExVDgJ
 LsBc3ix5MPX52djmZR86l1G6FiNVhGhNBq3yzNG2Dqi3CgFVVjmX8z6+YqaYeMjQUKyaCLxsh+buuXBmbWVX
 h0JfYOyOMymwZS32eTeZGRLP2czHMOlPZ1i45MPQW8qxwDHVZo8rJkqz1A6U2FYbjR8/4l/2U5NkWuADMe/n
 953Ow8Y3WAMvAIr2mISxLCh19lgCUvN1ogRNMjlgyoE0QSqDf7Ww0IT4kYTa84a0ZpIZhc5cBIUzHLDqwPbv
 EDdzyKaJcYNJ3ZWtwqdHmts6GwNy3SqMuYEYuDL0CinXl6Q/M92BLqeEaOmpXbQe+Nmd1pHnnPujciGAmnX1
 scPw0DC1ihr8rXGPmOhhs29OAO8bg8XBThYWqwtfPjNu5iZPb1HrvLEVdtBPZEkohNd8GtX0G3Qm7r1xvhq1
 y6oAt8CmEgv/BnD7bqkO/oum+1a4Qpl0XlnzwfISNIJ/aP0nZH01KgHcWFe472KkjubzJscARmoOponEsRzT
 dWMWfCuB/cip/J3dBc7KjJCJQsrudvGTvkr24ilFENQsrYQOpegPe7QlfiV81/4WGAc9TQjZ5a5Uin4NfQoW
 nD7zx77xk9Q349SOY/8wplvxJh9xK8FS6SCASkwggEloAMCAReiggEcBIIBGO9tALYtk9VDfo+h8LzRHPA+k
 N1SsEXqDooPcZEIpgNw+6stqoAVRc4GLb9IC13x27GAFYTzeTo8hNRDeawXGAaBxvfaVH2NNgEoOxqREUEf7
 Q+77HGxJQjqcnvU/UCMM1UomvNG3JPAhu/Xje56yY5Ijl+WTjY0PfZCepkzdIqT+IBt3INwCWZnvj8znNPrD
 5BdSRFwqqkKxtAAcoK6oJolX0MXdhqIiwwdtiTBFTK8gN/Yt7PdG6Qu/AFeLHIXNR0QcGmLVMVdq3zG3ydgM
 3j65sLK6L/9nTwUqEk66kTZzKI5h+Vm0ta4DV5fesH2qP7+78a2+9KiEoVx8s5ShiQy7QMY2Iyp8psD9hxkn
 j91OjhnVTE1G9E=0000002CBHN0baxt/4Fec5gQa3hWkqr4BEVcGS/iLwNbL4ZETcc=." Attempted
 failover to alternate host, but that did not succeed. Either there are no alternate
 hosts, or delivery failed to all alternate hosts. The last endpoint attempted was....

I tried to telnet exchange 2007 and had no problems...

What is this?

Hello

tip: https://support.microsoft.com/en-us/kb/979175

Hi Eamin,

Thank you for your question.

Did this issue occur all the time?

Are there any updates in the recently?

First of all, we make sure Exchange Server authentication was checked in receive connector on both Exchange 2007 and Exchange 2013.

Then we could disable anti-virus on Exchange server to check if the issue persist.

If there are any questions regarding this issue, please be free to let me know.

Best Regard,

Hello guy,

Yes, this issue occurred all the time only on one of DAG member.

It was fixed by very strange solution.

When I check default receive connector on affected exchange 2013 server, exchange server authentication was checked. I unchecked it and restarted transport server. After it, I checked it again and restarted transport service again.

I checked in a few minutes and saw that the queue was empty....

P.S. Why should I check default receive connector configuration on exchange 2013 server which sends mail to exchange 2007? Should not it be an issue on receive connector on exchange 2007?

Hello guy,

Yes, this issue occurred all the time only on one of DAG member.

It was fixed by very strange solution.

When I check default receive connector on affected exchange 2013 server, exchange server authentication was checked. I unchecked it and restarted transport server. After it, I checked it again and restarted transport service again.

I checked in a few minutes and saw that the queue was empty....

P.S. Why should I check default receive connector configuration on exchange 2013 server which sends mail to exchange 2007? Should not it be an issue on receive connector on exchange 2007?

• Marked as answer by jim-xuModerator 22 hours 7 minutes ago

Hi,

Exchange Server authentication should be checked in receive connector on both Exchange 2007 and Exchange 2013.

If there are any questions regarding this issue, please be free to let me know.

Best Regard,

Jim