Exchange Expert and MVP | Krishna Kumar | SMT Port 25

Working in Exchange Engineering Team in a Leading Financial Organization of the World and certified with Microsoft Certified Technology specialist and I have completed my Msc in IT. Please find my technical transcript  and Microsoft MVP Profile in the below link


Transcript ID: 783264
Access code  : smtpport25

This is page related any thing and every thing related to email and exchange. I have tried to put in my best of my Knowledge into it. I hope it will be useful to technical guys like you.   – Please put your precious comments on the topics, that would really help me !!!

Myself Bit Technical, Athletic, Enthusiastic, Funny, simple and does things in Style …. 🙂
Some of my Enthusiastic activities

18 thoughts on “About

  1. Hero,

    Hero you are really a hero. It is really a great one and I am surprised and disappointed that, I didn’t know blog this for long time. Keep rocking your technical work!!!!!!


  2. Congratulations from me and the whole PowerGUI/QAD cmdlets team on the MVP award! Well done and keep up the great work!


  3. I am in the middle of an Exchange 2007 to Exchange 2010 migration and I’m having some difficulties. I was hoping you could offer advice.

    Currently, both servers are co-existing on the same network and both have the HUB+MBX+CAS roles. CAS redirection is working properly because when I logon to the OWA of the 2010 server with a user whose mailbox is on the 2007 server, the single sign on logs me into the 2007 server.

    When I logon with a user whose mailbox is on the 2010 server, I can send mail to email addresses on the internet, but not to anyone within our organization whose mailbox is on the 2007 server. In fact, I cannot send mail to other mailboxes on the 2010 server either.

    From the accounts on the Exchange 2010 server, I cannot receive mail from anyone outside or inside.

    I have setup the Send and Receive connectors correctly. I have Installed the certificates correctly. I have enabled the legacy domain name on the old server and redirection works correctly to that name.

    I’m at a loss, and I need to figure this out quickly and my job is on the line. Any suggestions you can offer would be most appreciated. Please email me and I’d be happy to give you any information you require to assist me. 🙂

  4. Hi krishna,

    Congratulations on the MVP Award.

    Really a great site for those who are working on Exchange . Continue the site with good articles.

    Thanks for sharing the knowledge you have gained .


  5. Hey Krishna,

    Great stuff dude, just went through your blogs and it has such a good stuff. Congrats on your MVP. Keep working on such stuffs, it gives so much to the community.


  6. Hello
    I hope you can help me.
    I cannot connect to Exchange server 2010SP1RU5v2 throuh Outlook 2003/2007/2010 using PoP3-SMTP connection.
    I set autentication:
    PoP3: port 995, check: This server require SSL connection.
    SMTP: port 587, check: This server require secure connection – i choos TLS.

    But when i run Test connection, outlook cannot send test e-mail. There is information: Server don’t use this authentication.
    It works when i use port 25 (with TLS) ora port 587 (without authentication).
    When I connecto to server by telnet: telnet EX1 587

    When I put ehlo I’ve got this answer:

    220 EX1.domain.com Microsoft ESMTP MAIL Service ready at Wed, 11 Jan 2012 18:09:16 +0100
    250-EX1.domain.com Hello []
    250-SIZE 10485760
    250 CHUNKING

    There is no 250-STARTTLS answer, but TLS authentication is checked on default Client receive connector.

    If I connect by telnet using port 25:

    250-EX1.domain.com Hello []
    250-STARTTLS – !!!
    250-AUTH NTLM
    250 XSHADOW

    There is STARTTLS. So why it doesn’t work on Client EX1? There is some bug after insstaling some rollup?

    If i create new receive connector and use the same setting are in default Client Ex1 connector but not use anf :: ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff noly IP for example, TLS works for outlook on computer with IP

    I hope you help me solve this issue.

    Kind Regards

  7. This is the best sites for me as a Exchange Beginner . Thanks !

    I’m preparing for a DR drill run test in the coming week and I would like to know if someone could

    validate our datacenter switchover procedure.
    I would like to keep both production site DR Site run at the same time independently during DR drill

    Here’s an overview of our environment…

    Production Site (vHQ-site)
    VDC1 -Domain Controller and DNS Server, witness Server
    Email01 -Exchange Server 2010sp1 (Hub, CAS and Mailbox Roles)

    DR Site (vBackup-site)
    VDC2 -Domain Controller and DNS Server, witness Server
    Email02 -Exchange Server 2010sp1 (Hub, CAS and Mailbox Roles)

    DAG cluster name = Email-HA
    DAG with DAC enabled
    Email01 and Eamil02 are DAG Member
    All mailbox started with DAG replication

    **DR Drill run Procedure **

    Production site
    VDC1 – up and running
    Email01 – up and running

    simulate the Datacenter failures
    at DR site
    1.shutdown VDC2, email02
    2.take snapshot for VDC2, Email02
    3.isolate the DR site Network from production
    4.startup VDC2, email02
    5.Sart Datacenter switchover
    5a. Check DAG Replication Status OK then
    Get-MailboxDatabaseCopyStatus -Identity * | select name, status | sort Status | ft -auto
    Test1 DB\Email01 servicesDown
    Test1 DB\Email02 failed (Remark: should be DisconnectedAndHealthly)
    5b.Get-DatabaseAvailabilityGroup |fl
    5c.Stop-DatabaseAvailabilityGroup -Identity Email-HA -Mailboxserver email01 -Configurationonly
    5d Net stop Clussvc
    5e Restore-DatabaseAvailabilityGroup -Identity Email-HA -ActiveDirectorySite vBackup-site
    5f Get-DatabaseAvailabilityGroup Email-HA -status |fl
    fail to get info becauase no Operational Servers and Primary Active Manager

    Resume DR site
    Shutdown VDC2, email02
    resume DR site Network to production network
    restore the snapshot
    Starup VDC2, email02

    **** Problems and Question****
    The main problems is due step 5f, no Operational Servers and Primary Active Manager cannot be up after shutdown in step 1 for take a snapshot. Therefore I cannot mount any passive database after datacenter switchover.
    How can I manually enable the DR site Operational Servers and Primary Active Manager to mount the database in DR site

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