geoffdavis
asked on
Exchange 2003 cannot send emails to Comcast
I have a client using XO as their ISP. They are running SBS 2003 and are having problems sending emails to Comcast accounts. XO doesn't offer a smarthost option and doesn't have an option to add an SPF record. We have setup a RDNS record.
At this point XO is not willing, or able, to do anything more to help troubleshoot this problem. As a workaround, I configured their domain to send emails using AuthSMTP.com, which worked fine with one exception. We have a few people that have their company email forwarded to an external account. Since AuthSMTP.com requires that each sending email address is authenticated prior to being able to send, all of the forwards from domains outside of the network fail with an 'not an authorized user' error.
Ideally I'd like for this to work like all of the dozens of other SBS servers we support.
Anyone have a brilliant and cunning plan?
Thanks,
Geoff
At this point XO is not willing, or able, to do anything more to help troubleshoot this problem. As a workaround, I configured their domain to send emails using AuthSMTP.com, which worked fine with one exception. We have a few people that have their company email forwarded to an external account. Since AuthSMTP.com requires that each sending email address is authenticated prior to being able to send, all of the forwards from domains outside of the network fail with an 'not an authorized user' error.
Ideally I'd like for this to work like all of the dozens of other SBS servers we support.
Anyone have a brilliant and cunning plan?
Thanks,
Geoff
ASKER
Papertrip - thanks for the response.
Do you believe that the SPF record would prevent emails from making it to Comcast?
BTW: We use ZoneEdit.com for DNS for all of our small clients and are able to add SPF records there. We use them because they queue up email if and when the server is down.
Do you believe that the SPF record would prevent emails from making it to Comcast?
BTW: We use ZoneEdit.com for DNS for all of our small clients and are able to add SPF records there. We use them because they queue up email if and when the server is down.
ASKER CERTIFIED SOLUTION
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Hi, is this still an issue?
If for example your domain registrar is godaddy, and they are still authoritative for your domain, that is where you would add the SPF TXT record for your domain.