Some sent emails are not received by recipients

[Guest]

Version: 2008 Operating System: Mac OS X 10.6 (Snow Leopard) Processor: Intel Email Client: Exchange I have an odd problem where im sending emails but some recipients are not receiving them. I have logged into the OWA and they do appear there. I contacted the hosting company who told me that the email header doesnt look right that Entourage is sending, here is an example header

User-Agent: Microsoft-Entourage/12.10.0.080409
Date: Thu, 20 May 2010 08:07:22 +0100
Subject: Test
From: Elida Fidler
To:
Message-ID:
Thread-Topic: Test
Thread-Index: Acr36xerojo2+mfpikW8dlZNpj2V3g==
Mime-version: 1.0

Any help would be apprciated.

 

[Guest]

Sorry, it cut off some of the code, here it is again, had to add some gaps:

User-Agent: Microsoft-Entourage/12.10.0.080409
Date: Thu, 20 May 2010 08:07:22 +0100
Subject: Test
From: Elida Fidler
To:
Message-ID:
Thread-Topic: Test
Thread-Index: Acr36xerojo2+mfpikW8dlZNpj2V3g==
Mime-version: 1.0

 

[Guest]

Ok, it wont let me add in the email address, the from, to and message-id do contain an email address each

 

[Corentin Cras-Méneur]

I have an odd problem where im sending emails but some recipients are
not receiving them.

99.999% of the time, the recipient server is filtering out mail coming
form your SMTP server.

Corentin

 

[AlphaBovine]

@ Corentin

I am having the same issue where two days ago random emails to various recipients simply would not be received. These emails would be HTML, Plain text, with and without attachments, New or Forwards....there doesn't seem to be any pattern to it that I can discern.

Also, we have not changed our outgoing SMTP server in a LONG time so I know it isn't that (unless the company itself changed it).

No database has been rebuilt recently either but I can't figure it out. How do you counteract this problem? Is it in the headers that Entourage creates?

 

[AlphaBovine]

One thing worth mentioning is that I use the outgoing SMTP from my hosing site for my mail. The one that is having the problem is from my ISP (Road Runner).

From what I can tell it has to be the headers, but I am not sure what to check for that would have affected the headers suddenly becoming a problem.

 

[Corentin Cras-Méneur]

@ Corentin

I am having the same issue where two days ago random emails to various
recipients simply would not be received. These emails would be HTML,
Plain text, with and without attachments, New or Forwards....there
doesn't seem to be any pattern to it that I can discern.

Also, we have not changed our outgoing SMTP server in a LONG time so I
know it isn't that (unless the company itself changed it).

In the situations I described, it's nothing that has changed on your side.
It typically happens because your SMTP has been blacklisted by the
recipient mail server (usually because the SMTP has been caught
relaying spam through one of its users). It usually resolves by itself.
On way to check it is to resend the e-mail through a separate account
using a completely different SMTP.

Corentin