[ale] Sendmail Question?

jmenor at dns.sbc.edu.ph jmenor at dns.sbc.edu.ph
Wed Jul 12 18:57:04 EDT 2000



	Thank You Gary for the explanation.

On Tue, 4 Jul 2000, Gary Maltzen wrote:

> At 06:22 PM 7/3/2000 , reji at sbc.edu.ph asked...
> >         How does sendmail work? What i mean to say is that how sendmail
> >handle the message you want to send including your attached document?
> 
> An e-mail message is logically divided in THREE parts
> 
>   1) the message envelope
>   2) the message header
>   3) the message body
> 
> When your e-mail program sends a message, it tells sendmail three commands:
> 
>   1) who the message is from (MAIL FROM)
>   2) who the message is to (RCPT TO)
>   3) the message content follows (DATA)

> Items 1 and 2 constitute the envelope; the first blank line in the
>content separates the header from the body. Attachments are just
>specially encoded body text bracketed by special flag (MIME/UUE) lines.
> Sendmail will generally be configured to modify the message header by
>inserting lines documenting how it received the e-mail for
>retransmission. Sendmail will generally examine the headers to avoid
>e-mail loops by limiting the number of "hops" through which the message
>passes. Attachments are generally encoded within the body and are not
>interpreted by sendmail although sendmail can be configured, for example,
>to examine the body for suspicious attachment types or names.

	Where can I configure sendmail  to examine the body of suspicious
attachment types or names?

Reji

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