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Can't send email to juno addresses

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9 replies

by stromn 4 views

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Recently we are having a problem sending email to anyone with a juno.com address. We have always been able to send to them until the last few weeks. We have Exchange Server 5.5 SP3 and Groupshield 4.5. There have been no changes to this server recently. Here is the message that is returned when we try to send email:

The recipient was unavailable to take delivery of the message. 550 Access denied

Anyone have any ideas?

9 replies

by brasslet

A "550 Access denied" generated from the receiving end can be caused by a couple of things.

If you've been blacklisted as an open relay, many mail servers will block mail from your domain and a 550 is the error message you'll get.

Another possibility is that there is no PTR record (reverse lookup) for your SMTP server, or the PTR that exists is incorrect. Some mail servers, espcially large hosts like Juno or AOL, will do a reverse lookup on incoming SMTP traffic. If it can't look you up,it'll NDR.

If your ISP hosts your DNS records, you'll need to talk to them if you confirm no reverse lookup. They'll need to fix it in DNS. I'd do it to conform, but I don't know your domain so that'd be kind of hard ;-). Good luck.

by stromn

I don't think the message is coming from the receiving end. It appears to come from our Exchange Server. We get the message right after we send it. Our workstations use Outlook 2000 and the server is Exchange 5.5 SP 3 (or maybe SP 4). We lease afirewall from our ISP. Do you think the problem may be there?

by gperrie

Can you send a mail to this address using another mail account eg. hotmail?

Gavin

by stromn

We can access juno mail from any internet account. We just can't access it from our own email.

by artcabot

I agree with brasslet, everything points to you being on whatever blackhole list(s) juno is using. Check your mail IP against these to see:
or.orbl.org
relays.ordb.org
relays.osirusoft.com
ordb.org
abuse.net (pw: pkdmmsu)

I've been there ---it's frustrating.

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