Some Lotus Notes 6.5 users get username/password prompt when receiving external email

1. The mail file and mail.box must both be at least R5 ODS.
2. In the person document for the user the format preference for incoming mail must be anything other than "Prefers Notes Rich Text."
3. If there is still an SMTP MTA (R4) in place, the message will be converted.
4. Older anti-virus software will convert the messages.
5. A LotusScript pre-delivery agent that modifies the body of a mail message without using session.convertmime = false prior to modifying the body field.

Do you have comments on this Ask the Expert Q&A? Let us know.