Undelivered Mail Returned to Sender

[Hasansaggaf]

Hi all

iam facing a problem in sending to some mail address which that zimbra not delivered the message to the recipient its not works with some hoster and it works with others below report describe my problem and message i received when i sent to one friend in hotmail.( we have upgraded to the latest network zimbra server 18 and this issue remain the same so could any one please assist us with this issue and i will be really grant for him/her)




(This is the mail system at host app-server1.pmd.local.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<a_habtoor@hotmail.com>: host mx1.hotmail.com[65.55.37.72] said: 550 DY-001
Mail rejected by Windows Live Hotmail for policy reasons. We generally do
not accept email from dynamic IP's as they are not typically used to
deliver unauthenticated SMTP e-mail to an Internet mail server.
The Spamhaus Project maintains lists of dynamic and residential IP
addresses. If you are not an email/network admin please contact your
E-mail/Internet Service Provider for help. Email/network admins, please
visit MSN Postmaster for email delivery information and support)
(in reply to MAIL FROM command)

[phoenix]

If you are on a Dynamic IP address then the answer is in the error message you've posted.

(This is the mail system at host app-server1.pmd.local.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<a_habtoor@hotmail.com>: host mx1.hotmail.com[65.55.37.72] said: 550 DY-001
Mail rejected by Windows Live Hotmail for policy reasons. We generally do
not accept email from dynamic IP's as they are not typically used to
deliver unauthenticated SMTP e-mail to an Internet mail server.
The Spamhaus Project maintains lists of dynamic and residential IP
addresses. If you are not an email/network admin please contact your
E-mail/Internet Service Provider for help. Email/network admins, please
visit MSN Postmaster for email delivery information and support)
(in reply to MAIL FROM command)

[Hasansaggaf]

If you are on a Dynamic IP address then the answer is in the error message you've posted.

what could be wrong with my message actually iam using Dynamic IP address i have posted to many email to different recipient and i got da same undeliver message reply please provide me a solution

[phoenix]

what could be wrong with my message actually iam using Dynamic IP address i have posted to many email to different recipient and i got da same undeliver message reply please provide me a solution

Did you read the error message above that I highlighted in red? That describes why your mail is not being accepted by other mail server, dynamic IPs are usually used by spammers and a lot of mail servers will not accept mail from those IP addresses. You'll need to relay your mail through your ISPs mail servers, make the change in your Admin UI and if you need to authenticate then use this information: Outgoing SMTP Authentication - Zimbra :: Wiki