I have a postfix e-mail server configured (mail.garyckelvey.com if you need dns information for this)

Anyway e-mail sent to some domains will not get through. I had someone send a message to one of these addresses while I was watching the postfix output. the recipient server said ti bounced the message because of 554 validating recipient. I looked it up online and found that this occurs when the sender cannot be verified. However I could not find any solutions on a postfix system like this using google, forum searches here also came up empty.

If it is a simple configuration problem please help me.

Thank you.

I wasn't able to ping/tracert your server to get its ip. Have you setup a pointer (ptr) record for your domain. Enter your ip address here: http://postmaster.aol.com/tools/rdns.html and make sure it resolves to your domain. A lot mail servers reject mail from other servers without a ptr record. Just a thought.

well, I am going through godaddy.com, I went through all their dns stuff and I am pretty sure it is configured right, but I still have problems. here is the log:

Jun 26 10:22:30 gma-web postfix/smtp[14005]: 2E6B9653D: to=<dooley@gabbartandwoods.com>, relay=mail-fwd.sbc-webhosting.com[161.58.18.5], delay=1, status=bounced (host mail-fwd.sbc-webhosting.com[161.58.18.5] said: 554 Validating Sender (in reply to RCPT TO command))
Jun 26 10:22:31 gma-web postfix/smtpd[13987]: disconnect from adsl-69-229-124-217.dsl.scrm01.pacbell.net[69.229.124.217]

here is my dns info (clipped)


Host Points To TTL
@ 69.229.124.218 3600 Edit Delete
files 69.229.124.219 3600 Edit Delete
gma-remote 71.39.157.173 3600 Edit Delete

CNAMES (Aliases)
Alias Points To TTL
mail @ 3600 Edit Delete
www @ 3600 Edit Delete
ftp @ 3600 Edit Delete

MX (Mail Exchangers)
Priority Host Goes To TTL
0 @ mail.garymckelvey.com 3600 Edit Delete
10 mail2 71.39.157.173 3600 Edit Delete
Add New MX Record

TXT (Text)
Name Value TTL
@ v=spf1 a mx ptr ~all 3600 Edit Delete