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Email messages blocked

Discussion in 'Free Shared Hosting' started by JimG, Mar 31, 2019.

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  1. JimG

    JimG Hosting Client

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    I'm not sure if this is the right place to ask this question.

    In the past two weeks I've had several sent messages blocked by the receiving ISP. One message was to [email protected] and one message was to [email protected] which appear to be the same ISP under the covers. I have forwarded the bounced emails to their abuse address but have not received any reply.

    I'm now at a loss. Is there anything else I can do to prevent this from occurring in the future. Having messages from my domain bounce forces me to forward the original email to my gmail.com account and then forward them on from there. Very cumbersome.

    TIA,
    Jim
     
  2. Bryan

    Bryan Administrator

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    Hi Jim,

    I hate to say, but no, there isn't really anything you can do. DKIM, SPF, and rDNS (the big ones that will cause deliverability issues) are configured fine. Our server itself is not listed on any blacklists at all.

    But email blocking has gotten so ridiculous these days (and somewhat rightfully so due to spam) that these providers will often block entire datacenters.

    Really the only thing you can do is write their abuse email and see if they are willing to un-blacklist/whitelist your address.
     
    Rony Ronouk likes this.
  3. JimG

    JimG Hosting Client

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    Bryan,
    Thanks. I'll do just that and post my results for others to see.
    Jim
     
    Bryan likes this.
  4. Bryan

    Bryan Administrator

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    Sounds good, and if they need any other information regarding the server or anything, please let me know.
     
  5. Konstantin

    Konstantin Premium Hosting Client VPS Client

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    Would the datacenter in Dallas help with this at all?
     
  6. Bryan

    Bryan Administrator

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    No. There is nothing on their end that would be causing it. It's simply these wacky providers that choose to block anything and everything.
     
  7. Konstantin

    Konstantin Premium Hosting Client VPS Client

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    I meant that the DC would maybe email AT&T on IF's behalf or something like that.
     
    Bryan likes this.
  8. Bryan

    Bryan Administrator

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    They certainly could, but it's still up to the other fools to decide if they want to unblock it or not. The datacenter probably won't sway them one way or the other. It's gotten quite silly, to be honest. Even my Gmail account was being blocked by various places a few weeks ago.

    The whole concept is actually pretty funny. If you don't send enough email from an IP, it has a bad reputation. If you send too much email from an IP, it has a bad reputation. There's no winning.
     
  9. Konstantin

    Konstantin Premium Hosting Client VPS Client

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    Picky picky IP reputation.
     
  10. Kuffy

    Kuffy Premium Hosting Client

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    I've got all of my Instafree domains and Instafree itself blocked by the WiFi service provided by the Morrison's supermarket chain. I can get round it by tethering my phone #, and by using a Tor window in the Brave browser. This won't help with email receipts though. I've had quite a few difficulties recently, so I haven't bothered to pursue the issue

    If I get the chance, I'll construct an enquiry and ask for an explanation. It may not be very helpful though, as they block the Morrison's sales splash page as well. :)
     
  11. JimG

    JimG Hosting Client

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    OK. I think all is fixed, now. At least, until next time. The owner of swbell.net, prodigy.net and att.net turned out to be ATT. I forwarded three different blocked messages to their abuse email address over 4-5 days and after several days I got a reply saying they had 'removed my IP address' from their block list. This would be the shared IP address and they included a stern warning about future abuses by me (us). I assume that anyone else going through this could follow the same path.
     
  12. Konstantin

    Konstantin Premium Hosting Client VPS Client

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    Could be miscategorization. Let us know what happens!
    @JimG glad it's working.
     
  13. JimG

    JimG Hosting Client

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    I thought all was fixed, but I'm having problems with another email address. I've tried sending messages both with and without attachments think the attachment might be the problem. They all bounce back with the same error. I've also tried to guess at the abuse email address to ask them and I can't figure that out. Maybe someone here can help. The error I get back is:

    This message was created automatically by mail delivery software.

    A message that you sent could not be delivered to one or more of its
    recipients. This is a permanent error. The following address(es) failed:

    [email protected]
    host swlxmx1.swmed.edu [199.242.239.113]
    SMTP error from remote mail server after RCPT TO:<[email protected]>:
    550 Administrative Prohibition. (1)


    Reporting-MTA: dns; dal.private-rack.com

    Action: failed
    Final-Recipient: rfc822;[email protected]
    Status: 5.0.0
    Remote-MTA: dns; swlxmx1.swmed.edu
    Diagnostic-Code: smtp; 550 Administrative Prohibition. (1)

    Jim
     
  14. Konstantin

    Konstantin Premium Hosting Client VPS Client

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    To confirm, they are able to send and receive email from others? In some cases EDU emails are locked down.

    Technical Contact:
    Domain Admin
    Southwestern Medical Center at Dallas
    5323 Harry Hines Blvd.
    Dallas, TX 75235
    United States of America
    +1.2146486554
    [email protected]
     
  15. Bryan

    Bryan Administrator

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    The 550 error means they are blocking our server or your domain for one reason or another.
     
  16. JimG

    JimG Hosting Client

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    I am, once again, fighting issues with some of my email messages bouncing back to me. This time the biggest culprit is any email address ending with @tx.rr.com (formerly TWC, now Charter). I can't even get an email to the Charter administration to be accepted.

    Background: my email address is [email protected], I use the Thunderbird email client on my desktop, use Frontier Internet with a dynamically assigned IP address, and access my email account most likely at dal.private-rack.com.

    I have discovered by using https://whatismyipaddress.com/blacklist-check that my IP address is on the dnsbl.spfbl.net block list. By going to that website and doing a query on my IP address it tells me that the reason I'm on the list is because I don't have a reverse DNS PTR zone entry. I've logged into the cpanel zone edit section and don't see where I can even add such a record. It isn't an option.

    I have shut off my router and forced Frontier to issue me a different IP address and I get the same response about an rDNS entry. I'm now wondering if the block list is complaining about the IP address at my house or the IP address at dal.private-rack.com?

    Anyone out there run into similar issues? Any recommendations?

    Thanks,
    Jim

    PS - A second question presented itself when I took a close look at the zone records in the cpanel. There is a TXT entry containing 'v=spf1 +a +mx +ip4:99.99.9.9 ~all'. The actual IP address in the +ip4 is significantly different than the shared IP address for my account. Is that normal? Or should they be the same?
     
  17. Jase Wolf

    Jase Wolf Premium VPS Client Premium Hosting Client VPS Client

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    The block list will be moaning about your personal IP most likely, as my broadband's IP is also on that blocklist as well as dnsbl.sorbs.net. ¯\_(⊙_ʖ⊙)_/¯
     
  18. Bryan

    Bryan Administrator

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    Hi Jim,

    That text entry does not look normal, and isn't something our server would add. My guess is that it is left over from perhaps before you transferred.

    I'm also curious, what are your nameservers currently for your domain?
     
  19. JimG

    JimG Hosting Client

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    My registrar is WSWD and the name servers are ns1/ns2/ns3/ns4.private-rack.com
    That's the only data I see on the WSWD website. Everything else is found in the InstaFree cpanel Zone Editor where my website and email are hosted. If that data transferred over from 1&1 (IONOS.com), I couldn't confirm or deny. I don't remember ever making changes via the Zone Editor myself. I've looked at to try and understand it and see if there was a way to create a reverse DNS PTR. Currently my shared IP address is .20 and the pointer in the v=spf1 is .18 which is confusing since I'm not a DNS zone expert.
     
    Last edited by a moderator: Feb 8, 2020
  20. Bryan

    Bryan Administrator

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    The rDNS is correct, as it is the rDNS for the mail server, which sends from .18. That's what is confusing. I'm not sure how they are saying there is no rDNS record, because there absolutely is
     

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