[Sigia-l] Images in HTML newsletters

[Conal Tuohy]

Martijn wrote:

> But if you want to do some measurements regarding the opening 
> of email, you need to embed an image that must be loaded from 
> a server, otherwise you cannot measure.

Many mail readers block images to ensure the receiver's privacy from
spammers. 

You might instead consider using the standard mechanism for requesting a
receipt, without being sneaky, as defined in rfc2298. :-)

http://www.ietf.org/rfc/rfc2298.txt