Email Attachment Safety

Definition

Email attachment safety addresses the risks and handling of files attached to email. Attachments are a leading vector for malware and phishing, so recipients, filters and senders all treat executable and unexpected files cautiously.

For marketers, attachment safety matters on two sides: avoid sending files that trigger filters or look suspicious, and protect recipients by following safe practices. Prefer linking to trusted hosted files over attachments where possible.

Best practices include avoiding executable attachment types, scanning files, bounding attachment sizes, linking to secure hosted versions, and educating recipients to expect them. This protects deliverability and reduces security risk.

Why It Matters

This matters because the choices you make here show up directly in your results. This protects deliverability and reduces security risk. When this is handled well it supports engagement, delivery, and the trust subscribers place in your brand; when it is neglected, the effects tend to show up in declining performance and harder-to-fix problems further down the line.

Best Practices

• Start with the fundamentals of Email Attachment Safety and build from a clear baseline, so later improvements are measurable rather than assumed.
• Keep Email Attachment Safety consistent with how the rest of your email programme works, so no single initiative works against another.
• Review how Email Attachment Safety is handled in your own data and adjust from what you see, rather than copying what another brand does.
• Test one change at a time and measure the effect before rolling it out more widely.
• Revisit your approach to Email Attachment Safety regularly, because audience behaviour and inbox technology keep moving.
• Make sure the basics — relevance, timing, and honesty — are solid before chasing more advanced tactics.