I have never seen a problem with sending an e-mail that would not go through just because it has an embedded image. I suspect the problem might be due to an inability to locate the image file due to a problem with the way that the image is inserted. If you used a local path to the image on your PC or network, TB may not be able to embed it properly.

You might want to think about updating Thunderbird. The current version is 6.0.2. The older versions had a lot of bugs that have been fixed.

It is difficult to tel what has changed. Perhaps the security has changed on your network and it is not allowing TB to access the image.

If anyone else has a fix for this, please jump in.

Any Help?

If you are no longer forwarding messages to your online Hotmail account, but rather are using Thunderbird’s filters to redirect the messages to a single Thunderbird message box, it should work fine.

If I set up forwarding to the same hotmail account in message filters on Mozilla Thunderbirds will I have the same problem or should it work ok?

If I understand this correctly, your problem has nothing to do with Thunderbird. Thunderbird does not automatically forward e-mails. That is done through your online e-mail accounts. It sounds like you have multiple ISP e-mail accounts set up to forward to Hotmail. You might be using filters to redirect messages to another account in Thunderbird, but that is not the same as forwarding an e-mail. Automatic forwarding should be done through your e-mail account’s online interface.

The IP address that is on the block list also has nothing to do with Thunderbird. Thunderbird messages that you send or manually forward will use the IP address assigned by your ISP (69.56.174.114 = The Planet). It looks like your ISP’s IP address is on Hotmail’s block list. It sounds like they do not want to resolve the issue with a tainted IP address. This problem is not related to attachments. The Hotmail message that you are getting is accurate. The ISP’s IP address is the problem. If you can get them to assign a different IP address, the problem should go away.

Having a big problem with mail forwarding in Mozilla thunderbirds (V 3.1.10).
When we started using this email software last year we had all emails forwarded to a hotmail account so that all emails could be accessed at home. This had been working fine until the beginning of the year. Now, instead of emails forwarding to the hotmail account an error message gets send back to the sender as follows: – host mx4.hotmail.com [65.55.37.120]: 550 SC-001 Unfortunately, messages from 69.56.174.114 weren’t sent. Please contact your Internet service provider since part of their network is on our block list. I have contacted our service provider but they haven’t been able to solve the problem. I have made sure that the forwarded messages are ‘inline’ and not ‘attachments’. In fact I can’t even delete the forwarding option as it doesn’t show in the message filter box. I have no idea what else to try. Can anyone help?

Thanks

Deborah

If you have everyone set up in your address book with a first name, last name and display name, you can just start to enter their name on the address line and Thunderbird will display a list that you can select from.

Another option is to set up mailing lists for groups of people that you contact regularly.