Sorry Grant. Still couldn't replicate it, using:
exec xp_smtp_sendmail
@to = 'myusername@myisp.com',
@from = 'mccork',
@attachment = 'c:\boot.ini',
@server = 'mail.myisp.com',
@subject = 'subject subject subject'
Maybe you're right and the NT SP and SQL 7.0 SP do combine to cause problems.
There's a mention in the doco about previous problem with SQL 7.0 and opends60.dll, which is fixed now. My version of mssql7\binn\opends60.dll is dated Apr 9 2002. What about yours?
Cheers,
- Mark