We are getting this error when emailing:
503 5.0.0 Need RCPT (recipient) (503)
The email gets bounced back to us. Sometimes the email goes through, sometimes it does not. We are using a fairly new version of exchange and windows 2003 on that server. I looked up this error online and got this:
"Your email provider failed the sender verification tests (i.e., it accepts mail to ANY address), and then when it was greylisted it re-transmitted the message too many times (more than three) in the spam-detection window (five minutes). Once this happens, you're blacklisted from the list. Unfortunately there's nothing you can do but wait until the blacklist entry times out (about one week). You might want to complain to your email provider, or you could change to a provider that's more friendly, or just use a different email address."
So I called our email provider (OneWorldHosting) and they said it is not their problem. They said it sounds like a reverse dns lookup problem. Now I am not expert on these subjects so is reverse dns lookup the same as sender verification? I think it is similar but I'm not sure. Anyways, OneWorldHosting told me to call whoever set up our reverse dns lookup to get it fixed, so I called my ISP. They havent called me back yet. What can I do to fix all of this?? Anything??
503 5.0.0 Need RCPT (recipient) (503)
The email gets bounced back to us. Sometimes the email goes through, sometimes it does not. We are using a fairly new version of exchange and windows 2003 on that server. I looked up this error online and got this:
"Your email provider failed the sender verification tests (i.e., it accepts mail to ANY address), and then when it was greylisted it re-transmitted the message too many times (more than three) in the spam-detection window (five minutes). Once this happens, you're blacklisted from the list. Unfortunately there's nothing you can do but wait until the blacklist entry times out (about one week). You might want to complain to your email provider, or you could change to a provider that's more friendly, or just use a different email address."
So I called our email provider (OneWorldHosting) and they said it is not their problem. They said it sounds like a reverse dns lookup problem. Now I am not expert on these subjects so is reverse dns lookup the same as sender verification? I think it is similar but I'm not sure. Anyways, OneWorldHosting told me to call whoever set up our reverse dns lookup to get it fixed, so I called my ISP. They havent called me back yet. What can I do to fix all of this?? Anything??
