Gmail automatically blocks certain file types (e.g., .exe, .jar, some .zip files) for security.
If your Google account storage (shared across Drive, Photos, and Gmail) is full, you won't receive any new mail at all. Summary Table: Blocking vs. Unblocking Results Where do future emails go? Can the sender tell? Block Automatically to Spam No, they receive no notification. Unblock Directly to your Inbox No, they aren't notified of the change.
Try Gmail's official mobile app, or access via an email client like Outlook or Thunderbird using IMAP/SMTP settings.
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