We have a few domains that are unable to send email to sbcglobal.net and pacbell.net.
When users try to send a message the get the following:
The following recipient(s) could not be reached:
firstname.lastname@example.org on 2/4/2008 10:31 AM
You do not have permission to send to this recipient. For assistance, contact your system administrator.
< local mail server #5.7.1 SMTP; 550 5.7.1 <email@example.com>... Access denied>
1. This is happening for multiple domains for different clients.
2. We have reviewed all of the domains and none are listed on a blacklist.
3. Even though we knew it wasn't an issue of their IP being blocked or refused we setup a smarthost and we got the same result.
4. When you telnet into one of the sbcglobal.net or pacbell.net mail servers and attempt to send an email you get an access denied error message as soon as you submit the "mail From:person.domain.org" command.
It appears to us that they are blocking particular domains because we can do this from any IP block and we get the same result. We have attempted to contact sbc but their support is a black hole as I'm sure most of you know, 4 hours of hold and transfers to get sent to the "if you would like to subscribe to DSL server please hold" line. If anyone has any suggestions please let us know.