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The 1&1 IONOS premium antivirus protection offers you additional protection against emails that have a dangerous virus in an attachment.
Harmless-looking email attachments can hide dangerous viruses. If you open such an attachment without thinking about it, the virus installs itself on your computer immediately, usually without you noticing it. The 1&1 IONOS premium virus protection automatically filters such emails and sends them to your spam folder.
1&1 IONOS Premium virus protection is
for Mail Business free of charge
for Mail Basic fee required