He is asking for more than just dynamic dns services, this is what it sounds like what he wants
http://dyn.com/email...mail-backup-mx/
We offer backup queuing for unexpected downtime on a main MX server for 10 days, storing and forwarding when you're ready.
So basically they are a secondary MX record for your domain, with a lower priority than your main MX. So if your down, others would send to this MX, they will then store the mail until your primary MX record is back online - and then send you the mail to your primary mx.
So you do understand from this statement
"most of my mail would be bounced due to running on a Dynamic IP."
That you will not be able to send mail to the major players right - yahoo, gmail, hotmail, etc.. Most all of them will not accept mail from a dynamic IP listed IP.
Connected to mailin-03.mx.aol.com.
Escape character is '^]'.
554- (RTR:DU)
http://postmaster.in...s/554rtrdu.html
554 Connecting IP: 24.13.xx.xx
554 RTR:DUSpamhaus PBL to block mail from dynamic and residential IP addresses. Per our E-mail Guidelines, we do not accept mail from such addresses. If you believe your IP is listed in error, please contact your ISP directly and have them update their listing with the PBL. If...
- your ISP reports that the IP is correctly listed in the PBL, and that you should be able to send mail from it, or
- you were recently assigned IPs, have changed the rDNS on them, and allowed 48-72 hours for propagation time...and you are still getting the error, please open a support request.
Now if your going to go with a backup MX service - might as well go with a delivery service as well
http://dyn.com/email...-standard-smtp/
They also mention in the above link the other reason you can not send mail to major players from a home/dynamic IP - your not able to set the rDNS (ptr) Many major players don't accept mail from them either.
DNS Blocks
- 554 DNS:B1reverse DNS of your IP Address is typical of a dynamic/residential IP Address. Please have it updated to something unique like mail.example.com, or use the mail servers your ISP provides for residential customer traffic. If the rDNS has been updated and the problem persists, please open a support request.
- rDNS must be in the form of a fully-qualified domain name. rDNS containing in-addr.arpa are not acceptable, as these are merely placeholders for a valid PTR record. rDNS consisting of IP addresses are also not acceptable, as they do not correctly establish the relationship between domain and IP address.
- rDNS that may be similar to dynamic IP space (containing pool, dhcp, dyn, etc.) may be treated as suspect, and should therefore should be changed to reflect a fully-qualified domain name with standard reverse DNS.
554 DNS:B2reverse DNS of your IP Address is typical of a dynamic/residential IP Address and has generated AOL Member complaints. Please have it updated to something unique like mail.example.com, or use the mail servers your ISP provides for residential customer traffic. If the rDNS has been updated and the problem persists, please open a support request.
- rDNS must be in the form of a fully-qualified domain name. rDNS containing in-addr.arpa are not acceptable, as these are merely placeholders for a valid PTR record. rDNS consisting of IP addresses are also not acceptable, as they do not correctly establish the relationship between domain and IP address.
- rDNS that may be similar to dynamic IP space (containing pool, dhcp, dyn, etc.) may be treated as suspect, and should therefore should be changed to reflect a fully-qualified domain name with standard reverse DNS.
421 DNS:NRReverse DNS lookup for your IP address is failing. This could be a transient issue. Confirm the IP that sends your mail. Then check the rDNS of that IP using our troubleshooting tools. If it passes, please wait 24 hours and re-try before opening a support request.
- rDNS must be in the form of a fully-qualified domain name. rDNS containing in-addr.arpa are not acceptable, as these are merely placeholders for a valid PTR record. rDNS consisting of IP addresses are also not acceptable, as they do not correctly establish the relationship between domain and IP address.
- rDNS that may be similar to dynamic IP space (containing pool, dhcp, dyn, etc.) may be treated as suspect, and should therefore should be changed to reflect a fully-qualified domain name with standard reverse DNS.
Now if all you want to do is accept incoming mail, and not be able to respond or send to major domains, or any domain that uses standard filtering practices.. Sure go right ahead and run your own email server.. Have fun securing from being an open relay, fighting spam, etc
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