Despite the vaguness and valiedity of your question and that you can get access or whatever vba supporting application to mail your lotus notes workbook . what object have you been using ? was it outlook ? was it sendobject function ? third party ?
Yet before you answer do note the following :
Receipts r halted by most mail service providers because it could be exploited by spammers and email-bombers , so i have to note that even on setting the option it still wouldnt help much .