Auto reply to email based on condition

[fhunt]

Hello,
I receive a few dozen emails a day which contain an attachment. Upon receiving it I send an "OK" reply if it contains correct attachment type and save that attachment to a folder. I am looking for a way to automate this process. Have looked at thunderbird and some addons like filtaquilla but they don't do what I want. Google isn't of much help either.

Is there any kind of software to do this? I'm using Windows XP and Gmail account. Any advice appreciated.

[patio]

Not sure how an app or addon would be able to determine if an attachment is of the correct type...or not so my guess would be No.

[fhunt]

Sorry, I meant the attachment's file extension. This can be easily done by scanning the body of email, I am just looking for a way to do that.

[soybean]

Sorry, I meant the attachment's file extension. This can be easily done by scanning the body of email, ...

It can?  How?  The attachment is not in the body of the email.

[fhunt]

Sorry, I meant the actual whole body of the email, not just the text part.
For example if in thunderbird you select an email and press ctrl+u it opens the body (source) of the email. If there are attachments, there are lines like this

Code: [Select]

Content-Type: application/x-gzip; name="*censored*.xml.gz"
I just need to scan that.