Problem with receiving emails on my MX (hosted on hostgator)

[NICKVDA]

Hi, I am having a problem when I tried to change my Mx records from my old provider to new one, hostgator. I had the website up and running fine and loading from my VPS. And I left my MX pointing at 0 for my old server and put the hostgator at level 10. Last night I made the switch, thinking everything was ready and put level 0 MX for hostgator and level 10 for my old email server.

I did a few tests sending myself emails from another website I have running, but on hostgators shared panel, and received fine. I also testing using my @msn.com and received that fine as well. However, people this morning started telling me that they were attempting to send emails to my users, but were getting a bounce on the email.

I contacted hostgator support and they said it could be propogation not going through, but problem I see with that is that my old server is still in my MX, so wouldn't the emails just drop into the old server until propogation went through?

I am not sure what else I can do this to get this fixed. Let me know if more information is needed to help me solve this.

Thanks in advance

[quietFinn]

Assuming that your MX records are hostnames, make sure that those hostnames resolve to right IPs.

[NICKVDA]

Yea the hostnames are resolving to the correct ip. I did an smtp test on mxtoolbox.com and got

"
OK - xx.xx.xxx.xxx resolves to xx.xx.xxx.xxx-static.reverse.softlayer.com
Warning - Reverse DNS does not match SMTP Banner
0 seconds - Good on Connection time
Not an open relay.
3.619 seconds - Good on Transaction time

Session Transcript:
HELO please-read-policy.mxtoolbox.com
250 xxxx.xxxxxx.com Hello please-read-policy.mxtoolbox.com [64.20.227.133] [47 ms]
MAIL FROM: <supertool@mxtoolbox.com>
250 OK [47 ms]
RCPT TO: <test@example.com>
550-(please-read-policy.mxtoolbox.com) [64.20.227.133] is currently notpermitted to relay through this server. Perhaps you have not logged intothe pop/imap server in the last 30 minutes or do not have SMTPAuthentication turned on in your email client. [842 ms]
QUIT
550-(please-read-policy.mxtoolbox.com) [64.20.227.133] is currently notpermitted to relay through this server. Perhaps you have not logged intothe pop/imap server in the last 30 minutes or do not have SMTPAuthentication turned on in your email client. [156 ms]
"

I changed server ips and website here though. Could the reverse Dns lookup affect my ability to receive emails from certain domains?

Thanks for your help

Regards

[quietFinn]

Seems the email is sent where the MX record points to, but the receiving server rejects the email, because for it the domain is an external domain.

Normally, when a domain is hosted in a cPanel server, and email for that domain is hosted in the same server, that domain exists in the file /etc/localdomains

But when email for that domain is hosted elsewhere, the domain does not exists in the file /etc/localdomains, but in the file /etc/remotedomains instead.

If a domain is in the file /etc/remotedomains the server does not deliver emails for that domain locally, even if there were email accounts for that domain.

Does that make sense?