Re: E-Mail services on personal workstation

On Sun, 16 Sep 2007 08:19:16 -0400, "Ditch Brodie" <dbrodie@xxxxxxx> wrote:
On Sun, 16 Sep 2007 07:01:54 -0400, "Michaël Grünewald"
<michaelgrunewald@xxxxxxxx> wrote:

I would like to set up the things so that:
* the machine periodically fetch mail from various mailboxes (I do
this with cron and fetchmail, but I do not hang on this);
* the machine handles local mail (from daemons);
* the machine uses the ``outgoing mail server'' managed by my ISP.

If you're trying to do what I think you are doing then sendmail,
postfix, etc... will work. BUT (why does everyone have a big but)

Most ISP's are going to be blocking port 25, which means you will
have difficulty sending mail out directly from your server to the
Internet. Local mail is not a problem, but sending it out to the
world is usually blocked by your ISP because they want to limit
spammers abillity to setup mailservers that would send out
millions of e-mail messages.

Michae:l specifically mentioned that he wants to forward all non-local
email to the ``outgoing mail server'' of his ISP, so that shouldn't be a
problem at all :-)

My ISP is Comcast and I use sendmail. Comcast blocks port 25. But I
get around this by adding a single line file called
/etc/mail/mailertable which contains the name of Comcast's smtp
server. I can use my local server to send mail out but it relays off
of Comcast's smtp server.

The `mailertable' feature is a very flexible characteristic of Sendmail,
but it's a bit of overkill in this case. If there's only *one* mail
relay you want to use (i.e. the one Comcast exposes to its users), you
can easily do the same thing by removing entirely the current
mailertable and using the `SMART_HOST' configuration option in your
`sendmail.mc' file :)

Having said that, the `mailertable' feature is actually pretty cool if
you are using a laptop at work, and you want to use your own Sendmail
setup for both work-related emails and non-work email. In that case,
depending on the office policy for outgoing email connections, it may be
worth using something like:

local email -> localhost delivery

work email -> internal company mail relay

other email -> some other mail relay

This is what I use at the office, when I connect my laptop at the Patras
offices of my employer, and in this case `mailertable' works remarkably
well. So well, in fact, that I haven't touched my laptop's Sendmail
setup since 2005 or so :-)

- Giorgos

.

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