I believe we are in the most up to date version of Saleslogix. 

I am having a problem with sending emails with attachments and choosing send slx to add this to history of the contact.  It seems to work find when emails are sent without any attachments.  Has anyone faced similar issues and is there a solution?

I get the following message.

 Could not upload attachment (file path).  Inner exception.  Remote server returned internal server error.

Response URL: http://.....UploadAttachment.ashx?.....An exception occurred trying to save the file you uploaded - message could not insert.

I had a similar problem in 7.5.4.  Turns out the user still had the 7.5.3 version of the Desktop Manager.  Once I installed the current version the error went away and email attachments worked normally.