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- From ucsd!daemon Tue Jul 16 09:46:47 PDT 1991
- Article: 3890 of mail.tcp-group
- Path: ucsd!daemon
- From: crompton@NADC.NADC.NAVY.MIL (D. Crompton)
- Newsgroups: mail.tcp-group
- Subject: USING POP
- Message-ID: <37525@ucsd.Edu>
- Date: 16 Jul 91 16:09:54 GMT
- Sender: daemon@ucsd.Edu
- Lines: 105
- Approved: nobody
-
-
- It seems that some group members missed an earlier message I sent out
- on POP. I am repeating it here for there benefit. Hope this answers
- most questions on the usage of POP.
-
-
-
- How to use POP in NOS
- ---------------------
-
- The HOST should establish a 'POPUSERS.' file in root with the following
- format:
-
- username:password:
- username:password:
- etc.
-
- There should be an entry for each user of your POP system. We generally
- use call letters for both entries. I.E. wa3dsp:wa3dsp:
-
- The HOST must also start the pop server 'start pop' which should go in
- your NOS autoexec.
-
-
- Each USER must add the following lines to there autoexec:
-
- 'pop mailbox CALL'
-
- Where CALL is the name of the mailbox on the host
- to retrieve mail from. The /spool/mail/CALL.txt file.
- Usually the users call.
-
- 'pop mailhost hostname'
-
- This specifies what host to pop from.
- I.E. 'pop mailhost wa3dsp.ampr.org'
-
- 'pop userdata user password'
-
- This data should match the data in the
- hosts /popuser file.
- I.E. 'pop userdata wa3dsp wa3dsp'
-
- 'pop timer 3600'
-
- For stations that are on for extended periods
- and receive there mail via pop from a mailhost
- this timer must be set to interrogate the host
- on a regular basis. Alternatively they could
- do a 'pop kick' to check for mail. Time should
- be set to probably no less than 1/2 hour on a
- radio circuit.
-
- 'pop kick'
-
- This should be entered at the end of your
- autoexec to check for mail from your mailhost
- at startup.
-
- So the autoexec entries would look like this for USER w3iwi...
-
- pop mailbox w3iwi
- pop mailhost wa3dsp.ampr.org
- pop userdata w3iwi w3iwi
- pop timer 3600
- pop kick
-
- and HOST wa3dsp's autoexec...
-
- start pop
-
- HOST wa3dsp's popusers. in root....
-
- w3iwi:w3iwi:
-
-
- A few other points...
-
- If a pop users wants mail to be delivered to the host for them to pick
- up via POP they should enter a 'reply to' field in BM.RC to direct
- mail to the host and not back to them.
-
- POP is a very good service for Amateur Radio. It is especially good
- when a flood of messages are sent out to all users. This is a condition
- that often causes crashes on memory marginal systems using SMTP. Also
- alot of unnecessary traffic is sent out to stations that are not on the
- air. With POP the user asks for and gets mail. This is naturally a random
- operation. Lowering channel congestion and NOS memory usage.
-
- Mail that is POP'ed from the host is deleted from the /spool/mail
- directory upon successful transfer. The USER is notified that new
- mail has arrived at the completion of the entire transfer.
-
- One drawback that I notice with POP is that the messages (many could
- build up) for a user are sent as a group. If the circuit fails with
- a hard error halfway thru a POP xfer of a message group, no messages
- are saved at the user end, even though some got thru. It is an all
- or none with POP. This reminds me of the stupidity of BBS's in this
- regard. Hopefully users will not let messages build up. I have some
- users who let the mail build up to 30 or 40K over a few weeks.
-
-
- Doug
-
-
-
-
-