Many spam filters block .zip files by default as they are a common way to transmit malicious code.

Is it better to use a link?

Yes, sharing a link to Google Drive or Dropbox is safer, more transparent, and less likely to trigger filters.

PDFs are generally considered safe, but suspicious link patterns inside PDFs can still trigger modern filters.

Which attachment types trigger the most filtering risk?

Executable and compressed formats are often higher risk, while common document formats are generally safer.

Often yes, especially for large or sensitive files, as it reduces attachment-based filtering triggers.

Scan your file attachments for high-risk extensions that frequently trigger spam filters.

Attachment Safety Scan identifies high-risk file types in your planned outreach that could trigger aggressive spam filters or blocks.

1

Identifies file extensions with high spam risk

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Explains why certain file types are blocked by Gmail/Outlook

3

Provides alternative link-sharing suggestions

4

Classifies attachment risk by extension and context

5

Suggests safer delivery methods for blocked types

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