Email to cell phone email not getting received

[Sipdigits]

When I email 408XXXXXXX@messaging.sprintpcs.com, the web gui says it sent the email but the receivee did not get the email. Yahoo and all other email systems does not have this issue. Is this a postfix thing? All other emails like name@whatever.com works. Thanks

[marcmac]

su - zimbra
zmmsgtrace -r 408XXXXXXX@messaging.sprintpcs.com

Does it leave the system? It's possible that sprint is dropping it because your mailserver's reverse DNS doesn't match it's hostname.

[Sipdigits]

I get this error when i run the trace. Does that mean sprint does not like my server? Thanks again

(connect to mx.messaging.sprintpcs.com[68.28.3.22]: server dropped connection without sending the initial SMTP greeting)

[marcmac]

Probably, if they didn't even send an SMTP greeting.

Since you got dropped before the EHLO exchange, it probably means that you're listed in a dns black-list somewhere, or they just block port 25 connections from your ISP as a matter of course. (Are you on a cable modem, or a large provider's DSL network?)

You might try relaying through your ISPs gateway.