Be wary of email attachments. Do not open anything unless you are certain it is safe. A message with a virus in the attachment can often appear to be sent from someone you know, so a known sender is not a guarantee that the attachment is safe. If in doubt, send your contact a message and ask “Did you really send this to me? What is it?”.
Opera does not run executable attachments in emails automatically, even when you view the email. To be infected by a virus, the file containing the virus has to be run. Simply saving a file containing a virus to disk will not infect your system. If you receive an alert from your anti-virus software about a virus in your cache, this only means that Opera has downloaded a page or resource containing a virus from a site you have visited, not that the virus has infected your system. Scripting and plug-ins are also disabled for mail and newsgroups.
Be wary of virus “warnings” from friends or colleagues. These “warnings” are almost as common as viruses themselves, and in most cases the warnings are hoaxes. You may receive an email warning of a virus that can be carried in the text of an email. This is not true. A virus cannot be passed to you in the text body of a message.
If you leave the authentication type for your login as the default, “Auto”, Opera will try the most secure authentication available and then work its way down the list should the first type fail. The authentication types available to you will depend on the mail server. Note that this will not encrypt your actual mail data, only your login. For information on using TLS or SSL to encrypt email, see the Opera Mail tutorial.
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