Please whitelist cPanel in your adblocker so that you’re able to see our version release promotions, thanks!

The Community Forums

Interact with an entire community of cPanel & WHM users!

SMTP error 501

Discussion in 'E-mail Discussion' started by Andysweb, Jan 24, 2011.

  1. Andysweb

    Andysweb Member

    Joined:
    Jan 24, 2011
    Messages:
    10
    Likes Received:
    0
    Trophy Points:
    51
    I have had an email bounce back saying that;


    SMTP error from remote mail server after initial connection:

    IP Address <xx.xx.xx.93> - HELO/EHLO Invalid or Non-Existent Reverse DNS

    but my account for this domain has the server as xx.xx.xx.97

    Your advice is appreciated.

    Thank you

    Andy
     
    #1 Andysweb, Jan 24, 2011
  2. LinuxTechie

    LinuxTechie Well-Known Member

    Joined:
    Jan 22, 2011
    Messages:
    502
    Likes Received:
    5
    Trophy Points:
    68
    cPanel Access Level:
    Root Administrator
    Hi Andy,

    Can you please check whether the domain's IP is having Reverse dns or not. I hopes the domain's MX is also pointing to the same server. ( O/w you need to check Rdns of the remote server to which MX is pointed.) You can use the below given URL to check whether the IP has got Reverse DNS or not.

    Ip Tools, DNS tools, internet tools, WHOIS, traceroute, ping, domain name tools >> Reverse DNS Lookup

    If Reverse Dns is not set for the IP you need to contact your host regarding this.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #2 LinuxTechie, Jan 24, 2011
  3. Andysweb

    Andysweb Member

    Joined:
    Jan 24, 2011
    Messages:
    10
    Likes Received:
    0
    Trophy Points:
    51
    Hi,

    Thank you for the reply. I am running a dedicated server.

    I have added the Rdns record (there was not any) and the MX records are pointing to the domain name.

    Do you think I have to wait for this change to propergate?

    That tool is still showing that there is no reverse dns.

    Thank you
     
    #3 Andysweb, Jan 24, 2011
  4. LinuxTechie

    LinuxTechie Well-Known Member

    Joined:
    Jan 22, 2011
    Messages:
    502
    Likes Received:
    5
    Trophy Points:
    68
    cPanel Access Level:
    Root Administrator
    Hi Andy,

    You are welcome. It may not take long for propagation and the results in the iptools may be a cached one. This can be checked using the below given commands :

    If you are confused of the results paste the output here and I will verify it for you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #4 LinuxTechie, Jan 24, 2011
  5. Andysweb

    Andysweb Member

    Joined:
    Jan 24, 2011
    Messages:
    10
    Likes Received:
    0
    Trophy Points:
    51
    Hi,

    Thank you again for your support. can you advice me where to run the commands? Is it in the shell via root?
     
    #5 Andysweb, Jan 24, 2011
  6. LinuxTechie

    LinuxTechie Well-Known Member

    Joined:
    Jan 22, 2011
    Messages:
    502
    Likes Received:
    5
    Trophy Points:
    68
    cPanel Access Level:
    Root Administrator
    Hi Andy,

    Please take a terminal and run it from your local machine.

    O/w you can simply use another tool which is mentioned below.

    Also check whether you are able to send mails now.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #6 LinuxTechie, Jan 24, 2011
  7. Andysweb

    Andysweb Member

    Joined:
    Jan 24, 2011
    Messages:
    10
    Likes Received:
    0
    Trophy Points:
    51
    I have just tried to resent the email but I am still getting the same message. :( May be it is cached.
     
    #7 Andysweb, Jan 24, 2011
  8. Andysweb

    Andysweb Member

    Joined:
    Jan 24, 2011
    Messages:
    10
    Likes Received:
    0
    Trophy Points:
    51
    Silly question to I set up the reverse DNS entry in the existing domain record or a new one?
     
    #8 Andysweb, Jan 24, 2011
  9. LinuxTechie

    LinuxTechie Well-Known Member

    Joined:
    Jan 22, 2011
    Messages:
    502
    Likes Received:
    5
    Trophy Points:
    68
    cPanel Access Level:
    Root Administrator
    Hi Andy,

    Let me know the domain so that I can check whether it is set correct or not. If you are not sure to set you need to contact your host or DC techs for this.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #9 LinuxTechie, Jan 24, 2011
  10. Andysweb

    Andysweb Member

    Joined:
    Jan 24, 2011
    Messages:
    10
    Likes Received:
    0
    Trophy Points:
    51
    the domain is totallyexpat.com

    Thank you
     
    #10 Andysweb, Jan 24, 2011
  11. Andysweb

    Andysweb Member

    Joined:
    Jan 24, 2011
    Messages:
    10
    Likes Received:
    0
    Trophy Points:
    51
    PS I think my isp is very slow in updating DNS..
     
    #11 Andysweb, Jan 24, 2011
  12. LinuxTechie

    LinuxTechie Well-Known Member

    Joined:
    Jan 22, 2011
    Messages:
    502
    Likes Received:
    5
    Trophy Points:
    68
    cPanel Access Level:
    Root Administrator
    Hi Andy,

    I could see that Rdns is not set for the IP. If you are sure you have set it correctly then we can wait for it to propagate. O/w please contact your host or DC to do it for you.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #12 LinuxTechie, Jan 24, 2011
  13. Andysweb

    Andysweb Member

    Joined:
    Jan 24, 2011
    Messages:
    10
    Likes Received:
    0
    Trophy Points:
    51
    Hi,

    my host are going to do this for me.
    Should I delete the record I have set up in Cpanel?

    I think I will wait for them to fix that and see what happens before deleting that record.

    Your help was very much appreciated.

    Thank you
     
    #13 Andysweb, Jan 24, 2011
  14. LinuxTechie

    LinuxTechie Well-Known Member

    Joined:
    Jan 22, 2011
    Messages:
    502
    Likes Received:
    5
    Trophy Points:
    68
    cPanel Access Level:
    Root Administrator
    Hi Andy,

    Thanks for posting what you have done. Unfortunately what you have done is wrong. It is not possible to set Rdns from cpanel. You can delete the record you have made.

    It is good to hear that you contacted your host. I am sure they will sort it out soon. Good luck.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #14 LinuxTechie, Jan 24, 2011
  15. Andysweb

    Andysweb Member

    Joined:
    Jan 24, 2011
    Messages:
    10
    Likes Received:
    0
    Trophy Points:
    51
    I meant under WHM .. shall i delete the record.
     
    #15 Andysweb, Jan 24, 2011
  16. LinuxTechie

    LinuxTechie Well-Known Member

    Joined:
    Jan 22, 2011
    Messages:
    502
    Likes Received:
    5
    Trophy Points:
    68
    cPanel Access Level:
    Root Administrator
    Hi Andy,

    I thinks you better update your host what you have modified than deleting it. If you are sure of reverting it back as before you can do it from your end.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #16 LinuxTechie, Jan 24, 2011
  17. cPanelTristan

    cPanelTristan Quality Assurance Analyst
    Staff Member

    Joined:
    Oct 2, 2010
    Messages:
    7,608
    Likes Received:
    32
    Trophy Points:
    238
    Location:
    somewhere over the rainbow
    cPanel Access Level:
    Root Administrator
    Hello,

    If you do not control the IP delegation, and most servers do not have control of the IP as the IP provider does, then you cannot setup a PTR record for rDNS in WHM and have it work. If you did set this up in WHM, then you should remove the PTR record you'd setup and let your host do it if they have the IP delegation.

    There is a major difference between IP zone records and domain DNS zone records. An IP zone record for PTR for rDNS is setup this way:

    Configuring Reverse DNS in WHM

    The only way these zones can be setup and work will be when the IP provider delegates control of the IP to the server, which again is rare and only happens if your IP provider does confirm they've delegated the control to your machine.

    Thanks.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #17 cPanelTristan, Jan 24, 2011
(You must log in or sign up to post here.)
Loading...
Similar Threads - SMTP error
  1. Jose_Marques

    SMTP (-1) error

    Jose_Marques, Oct 9, 2018, in forum: E-mail Discussion
    Replies:
    6
    Views:
    110
    cPanelLauren
    Oct 15, 2018 at 12:28 PM
  2. emcarpanezi1995

    Error smtp cliente connect

    emcarpanezi1995, Oct 8, 2018, in forum: E-mail Discussion
    Replies:
    1
    Views:
    63
    cPanelLauren
    Oct 9, 2018
  3. Gabriel Rodrigues

    SMTP error from remote mail server after RCPT TO

    Gabriel Rodrigues, Aug 16, 2018, in forum: E-mail Discussion
    Replies:
    3
    Views:
    293
    cPanelMichael
    Aug 17, 2018
  4. takeno

    SMTP error from remote mail server

    takeno, Aug 10, 2018, in forum: E-mail Discussion
    Replies:
    23
    Views:
    749
    cPanelLauren
    Aug 21, 2018
  5. Emilio Deciga

    Error 505 smtp bloqueado

    Emilio Deciga, Jul 5, 2018, in forum: Discusión en Español
    Replies:
    1
    Views:
    288
    cPanelLauren
    Jul 6, 2018

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Accept Learn More...
    Dismiss Notice