Yesterday i was trying to send a compressed file to a cousin via e-mail. He told that he never got anything on his mailbox. He was using Hotmail and i sent the file using my ISP’s account in Outlook 2007.

After several tries, nothing happened: I didn’t receive any errors on my side and he didn’t got the file.

I tried to re-send it but this time i add my GMail account to the recipients.

I got this error from GMail: 552 5.7.0 Illegal Attachment so i knew GMail blocked the mail because of the attachment.

The problem is that i don’t know if my ISP or Hotmail were blocking the other tries.

I will try to contact my ISP to see if they are blocking because i didn’t receive any error from the mail server.

The compressed file i was trying to send contained a little .exe program along with other text files.

This a new way of blocking, so if you ever need to send an executable file using Gmail or other ISP’s, you will need to change the extension of the .exe files in order to bypass this, even if you compressed them.

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