I've spent a little bit thinking about smtp and smtpd after reading this: http://www.declude.com/info/logs.htm
And now I have a few questions on the topic:
Does smtpd mean smtp daemon?
Correct.
Is smtpd a device that listens for messages coming in, or messages that need to go out, and smtp is actually the mechanisms which delivers it?
SMTP is the protocol.
SMTPD usually refers to a program (SMTP Daemon), which listens on the SMTP port (25), accepts E-mail, and delivers it (either locally, or to a remote server).
IMail also has an SMTP32.exe process, which handles the actually delivery of the E-mail (IMail v8 uses the queue manager to do this).
Does smtpd receive an incoming email from another server pushing via smtp...
In many cases, yes. It may also receive E-mail from a mail client, which would also be done via SMTP.
... and then deliver to a local user via smtp?
Actually, if the E-mail is for a local user, IMail uses the SMTP32.exe process (or Queue Manager) to deliver the E-mail -- but in this case, it doesn't need to use SMTP (it did when it received the E-mail, but since the delivery is done on the local server, it doesn't need to use SMTP at this point).
Does smtpd receive an email from a user, and then use smtp to send it out to another server?
SMTP is the protocol. SMTP is used to send an E-mail from a mail client to a mailserver, or one mailserver to another mailserver.
The IMail SMTPD32 process handles the receiving of an E-mail via the SMTP protocol.
The SMTP32 process hadnles the delivering of an E-mail (either to another mailserver via the SMTP protocol, or to a local mailbox using IMail's own proprietary techniques).
-Scott
---
Declude JunkMail: The advanced anti-spam solution for IMail mailservers since 2000.
Declude Virus: Catches known viruses and is the leader in mailserver vulnerability detection.
Find out what you've been missing: Ask for a free 30-day evaluation.
--- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)]
To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
