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I need urgent help please. One of my clients had a domain(example.com) which they forgot who they bought it from 3 years ago. i transferred it to my hosting account as addon domain, then they told me they had emails with same address @example.com The emails stopped working, and after doing a bit of research I need to change the MX, A and CNAME records back to what they used to be. How can i find out what this settings used to be? with my hosting account settings my client said they are able to send emails but not receive.

I've managed to find out an IP address which is 203.45.192.142 but Im not really sure what to do with this though.

If someone could help me and guide me I will really appreciate it. Cheers!

Sergio Alen
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You need to study the headers of an e-mail received by your client. The headers will show the e-mail server they were using to receive e-mails.

You need to put the DNS name of that server into the domain's MX record.

Then, if the DNS name of the e-mail server points to their @example.com domain, the corresponding DNS name to IP address mapping has to be put into the domain's A record.

Tero Kilkanen
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  • Thank you for replying, below is a copy of the fail to deliver email: – Sergio Alen Nov 08 '14 at 14:59
  • : host mail.kestrelcontracting.com.au[216.40.42.5] said: 554 5.7.1 : Recipient address rejected: Access denied (in reply to RCPT TO command) Reporting-MTA: dns; relay.mailchannels.net X-Postfix-Queue-ID: EE34CADE14 X-Postfix-Sender: rfc822; info@geekick.com.au Arrival-Date: Fri, 7 Nov 2014 09:30:33 +0000 (UTC) – Sergio Alen Nov 08 '14 at 15:00
  • Final-Recipient: rfc822; maree@kestrelcontracting.com.au Original-Recipient: rfc822;maree@kestrelcontracting.com.au Action: failed Status: 5.7.1 Remote-MTA: dns; mail.kestrelcontracting.com.au Diagnostic-Code: smtp; 554 5.7.1 : Recipient address rejected: Access denied – Sergio Alen Nov 08 '14 at 15:00
  • You should add these to the original question with proper formatting. Anyway, this tells that `mail.kestrelcontracting.com.au` rejects the e-mail for some reason. You need to check that e-mail server settings. – Tero Kilkanen Nov 08 '14 at 16:51
  • Is this really an e-mail received correctly by your client when everything was running correctly? – Tero Kilkanen Nov 08 '14 at 17:15