Some Email loses html format

Some email, sent from an Outlook 2010 through an exchange 2007 account in HTML format, when is received in a gmail account has all the images of the signature and images embedded on the body like links (cid:asda@sdasdasd) or the link to the URL and the format is changed to plain text.

This not happen with all the mails, only some of them. I can't find the pattern.

Anybody knows what can it be?
Toni IsystemsCTOAsked:
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Simon Butler (Sembee)ConsultantCommented:
Primary reason for that is interference. AV software, anti-spam software, firewall doing SMTP scanning etc, usually with the actual underlying cause being the signature area.

Logos have no place in an email signature, they just cause bloat. Therefore if it is happening with images in the signatures, remove the images and test again.

Toni IsystemsCTOAuthor Commented:
All the company have the same signature, all of them send through the same exchange server, edge, AV and firewall. 90% of sent items reaches destination with the correct html format, 10% of them lose format. That's what I can't understand.
Simon Butler (Sembee)ConsultantCommented:
That is one of the problems with using images in signatures - you cannot control how they will be rendered at the other end. If 90% of the email is delivered correctly then the problem is probably not at your end - it will be down to the recipient.
Images in signatures are a bad idea anyway as they can get the messages flagged as spam. If they are embedded then that is a common spammer's technique to get through the filter, if they are remotely linked then they are seen as web bugs and/or the recipient has to choose to display them.

There isn't really a fix, other than removing images from the signatures.

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Toni IsystemsCTOAuthor Commented:
I can't believe there is no fix to this problem, it this means that all the companies of the world has the same problem??? Don't think so
Simon Butler (Sembee)ConsultantCommented:
What you will find is that most companies do not use images in signatures, unless they have been put there by the end users.

Anyone working with email will tell you that it is impossible to format an email so it appears the same for every user - the only reliable way is to use plain text.
Anything else is at risk of being mangled by systems outside of your control. It has got better over the years as email vendors work to ensure the rendering is the same and Microsoft Exchange takes over the email world. I can vividly remember when there were huge problems with formatting between Exchange and Lotus Notes (for example).

If you want to use images in signatures then you have to accept that they may not appear as you expect at the other end.

Toni IsystemsCTOAuthor Commented:
Ok, I can assume that it can be produced due mail servers incompatibilities. But I can't understand that one user from the company A sends a mail to a user from a company B and the mail reaches properly. But a second user from the same company A sends the same mail to the same user on company B and it reaches without format.

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Simon Butler (Sembee)ConsultantCommented:
You have to look at the entire email. I have seen things like signatures or other images in the messages cause these problems. It can only take a single image to break everything because the other side cannot render it correctly.

Toni IsystemsCTOAuthor Commented:
That was an explanation but not a solution.
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