Emails to gmx.co.uk bounced. Could ADSL be the problem?

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tim.nbj
Posts: 9
Joined: Sun Sep 28, 2014 8:38 am

Emails to gmx.co.uk bounced. Could ADSL be the problem?

Post by tim.nbj » Wed Dec 23, 2020 10:02 pm

Hi Ian

I am trying to email someone with a gmx.co.uk email address using MailEnable's SMTP relay but I am getting a bounce message with the following errors:

554-gmx.net (mxgmx014) Nemesis ESMTP Service not available
554-No SMTP service
554-Bad DNS PTR resource record.
554 For explanation visit https://www.gmx.net/mail/senderguidelines?ip=95.172.233.137&c=rdns

I do actually have a valid PTR which is as follows:

w-137.cust-17877.ip.static.uno.uk.net

I have configured both the "Local domain name" and "Default mail domain name" boxes with the above value. Do you know what could be the problem?

I seem to remember reading somewhere that some email providers reject all emails that come from mail servers located behind ADSL connections. My copy of MailEnable is behind an ADSL connection. However, I have configured SPF, DKIM and DMARC correctly for my domain which points to the static IP of my ADSL connection. Could the ADSL be the problem? If yes, is their a way round this? Is there a way I can make gmx.co.uk think that my connection is not an ADSL connection?

Thank you very much.

Kind regards

Tim

MailEnable-Ian
Site Admin
Posts: 9275
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: Emails to gmx.co.uk bounced. Could ADSL be the problem?

Post by MailEnable-Ian » Wed Dec 23, 2020 10:37 pm

Hi,

Can you post up the SMTP activity and debug snippets in regards to the message sent to the gmx server
Regards,

Ian Margarone
MailEnable Support

tim.nbj
Posts: 9
Joined: Sun Sep 28, 2014 8:38 am

Re: Emails to gmx.co.uk bounced. Could ADSL be the problem?

Post by tim.nbj » Wed Dec 23, 2020 11:50 pm

Hi Ian

Thank you very much for your reply.

The snippets you requested are as follows: (Some information has been redacted with asterisks because I don't want people knowing my email address.)

12/23/20 21:37:49 SMTP-IN 50BF57F485194366B2FF73B86BAB1E02.MAI 840 192.168.1.3 220 w-137.cust-17877.ip.static.uno.uk.net ESMTP MailEnable Service, Version: 9.84-- ready at 12/23/20 21:37:49 112 0
12/23/20 21:37:49 SMTP-IN 50BF57F485194366B2FF73B86BAB1E02.MAI 840 192.168.1.3 HELO HELO ***** 250 Requested mail action okay, completed 155 14
12/23/20 21:37:49 SMTP-IN 50BF57F485194366B2FF73B86BAB1E02.MAI 840 192.168.1.3 MAIL MAIL FROM: <*****@*****.com> 250 Requested mail action okay, completed 43 36
12/23/20 21:37:49 SMTP-IN 50BF57F485194366B2FF73B86BAB1E02.MAI 840 192.168.1.3 RCPT RCPT TO: <*****@gmx.co.uk> 250 Requested mail action okay, completed 43 35
12/23/20 21:37:49 SMTP-IN 50BF57F485194366B2FF73B86BAB1E02.MAI 840 192.168.1.3 DATA DATA 354 Start mail input; end with <CRLF>.<CRLF> 46 6
12/23/20 21:37:50 SMTP-IN AF2E6B8F7B1A43289292107CA6DD33DC.MAI 840 192.168.1.3 QUIT QUIT 221 Service closing transmission channel 42 6




12/23/20 21:37:49 ME-I0107: [840] Relay Granted: Sender IP (192.168.1.3) is within an authorized IP range.
12/23/20 21:37:50 ME-I0149: [840] 50BF57F485194366B2FF73B86BAB1E02.MAI was received successfully and delivery thread was initiated
12/23/20 21:37:50 ME-I0074: [1204] (Debug) End of conversation
12/23/20 21:37:50 ME-I0074: [840] (Debug) End of conversation
12/23/20 21:37:51 ME-I0018: [847BD986A59A46DDAFE9CFACD445C7C1.MAI] Outbound message from ([SMTP:*****@*****.com]) requeued as [3EF9BFD4C80D4EE5BF0C80D6914576C9.MAI] to the target domain [gmx.co.uk]
12/23/20 21:37:51 ME-I0123: Domain [gmx.co.uk] has MX list [mx00.gmx.net,mx01.gmx.net]
12/23/20 21:37:51 ME-I0026: [3EF9BFD4C80D4EE5BF0C80D6914576C9.MAI] Sending message
12/23/20 21:37:52 ME-IXXXX: [3EF9BFD4C80D4EE5BF0C80D6914576C9.MAI] DNS resolved to the following record: IP Address=212.227.15.10, Family=2, Type=1, Protocol=6
12/23/20 21:37:52 ME-IXXXX: [3EF9BFD4C80D4EE5BF0C80D6914576C9.MAI] Remote server returned a response indicating a permanent error. Server Response: (554-gmx.net (mxgmx014) Nemesis ESMTP Service not available**554-No SMTP service**554-Bad DNS PTR resource record.**554 For explanation visit https://www.gmx.net/mail/senderguidelines?ip=95.172.233.137&c=rdns**)
12/23/20 21:37:52 ME-E0193: [3EF9BFD4C80D4EE5BF0C80D6914576C9.MAI] Message Delivery Failure. Attempt (0): Could not deliver this message to its target domain (gmx.co.uk) because the mail server responsible for this domain returned a permanent error.
12/23/20 21:37:52 ME-I0119: Domain [*****.com] has used local loopback address [127.0.0.1] because it is hosted locally.
12/23/20 21:37:52 ME-I0026: [3EF9BFD4C80D4EE5BF0C80D6914576C9.MAI] Sending message
12/23/20 21:37:52 ME-IXXXX: [3EF9BFD4C80D4EE5BF0C80D6914576C9.MAI] DNS resolved to the following record: IP Address=127.0.0.1, Family=2, Type=1, Protocol=0
12/23/20 21:37:52 ME-I0101: [808] Local Delivery: Address ([SMTP:*****@*****.com]) is local.
12/23/20 21:37:52 ME-IXXXX: [3EF9BFD4C80D4EE5BF0C80D6914576C9.MAI] message from domain *****.com signed with DKIM signature.

MailEnable-Ian
Site Admin
Posts: 9275
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: Emails to gmx.co.uk bounced. Could ADSL be the problem?

Post by MailEnable-Ian » Thu Dec 24, 2020 12:43 am

Hi,

Private message me the sending domain details.
Regards,

Ian Margarone
MailEnable Support

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