Cannot send emails to hotmail.co.uk email addresses

Due to some reason, we cannot send emails to the hotmail.co.uk email address. It comes up with the following error (I have hidden the user details due to security reasons):

The following recipient(s) cannot be reached:

      xxxx@hotmail.co.uk on 04/11/2008 14:52
            There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.
            <ourdomain.co.uk #5.5.0 smtp;550 OU-001 Mail rejected by Windows Live Hotmail for policy reasons. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation problems. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. Email/network admins, please visit http://postmaster.live.com for email delivery information and support>
-------------------------------------------
Any suggestions, what can be the problem. Our domain is not listed in any blacklists and mail server has a reverse DNS record setup correctly. Please help.
LVL 6
MSWarriorAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

kuknoCommented:
>Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation problems.

your sending ip address seems to be treated as spammer address, thus they don't accept e-mails from you. Try to contact them and clarify the issue:  http://postmaster.live.com
0
MSWarriorAuthor Commented:
Thanks for your comment Kukno.

I have checked our IP in the spam lists (www.spamhaus.org) and have also checked with the ISP, it is clean. I have sent an email to http://postmaster.live.com requesting further clarification. It's quite funy as I have tried sending messages to few hotmail.com users and it works but it doesn't for any hotmail.co.uk users. Any more suggestions?
0
kuknoCommented:
>Any more suggestions?

spamhaus.org is just one RBL list. As you don't know how they configured their Anti-Spam System, your only real chance is to communicate with them.

Here are some other things to check:

1.) Is your DNS properly configured, i.e. does it contain a PTR Record for your sending IP address that "points" to the same name as the MX Record for your domain. Some mail systems do check this.

2.) Check you IP address on more RBLs

  http://www.robtex.com/rbl/

Try other "google: multi rbl check" tools.

3.) Use a different IP address to send e-mails.

4.) Ask your provider if he can provide a "smart host" for you.

Cheers
Kurt


0
Simplify Active Directory Administration

Administration of Active Directory does not have to be hard.  Too often what should be a simple task is made more difficult than it needs to be.The solution?  Hyena from SystemTools Software.  With ease-of-use as well as powerful importing and bulk updating capabilities.

MSWarriorAuthor Commented:
Thanks Kukno,

I am really sorry for the late reply.

1.) PTR records -  I was checking your first suggestion and found out that the PTR record points to mail.ourdomain.co.uk, whereas the MX record for our domain points to the mxav1.ourdomain.co.uk

2.) I have checked our IP on the suggested website, and it is not listed.

Haven't tried 3.) and 4.) yet.

Please suggest on the above.

0
kuknoCommented:
>Please suggest on the above.

well, change your MX record to mail.ourdomain.co.uk.

AND you should really contact the postmaster of the recipient and ask why your e-mail was blocked. Otherwise you end up trying to change all kind of things without success.

Regards
Kurt
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
MSWarriorAuthor Commented:
Thanks Kukno,

I have changed the MX record and it seems to be working fine now. We were having problems with AOL and even that is fixed. I will def accept ur solution.

Regards,
MSW
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Email Protocols

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.