somebody at shoestringwebs
Jan 15, 2007, 7:44 AM
Post #1 of 6
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I have been lurking for a while and have come to realize that you guys
who provide the great advice and assistance are not only extremely
knowledgeable but have the patience of saints! Thank you for the great
service.
I operate a Virtuozzo Virtual Private Server (cPanel, Exim, BIND, cppop)
with about 75 client accounts, most of which I manage directly. I can do
pretty much whatever I want with email. For the past month, Comcast has
blacklisted my mail server at least twice a week. It hasn't been
hijacked to send spam but, like most folks, many of the domains have
been spoofed.
Almost every account forwards its mail to the client's ISP; very few
utilize mailboxes on the VPS. Until recently, I usually set up the
accounts with the default "catch-all" address enabled. (Almost all have
been disabled at this point.) Except for a couple of clients who use the
webmail, all send email through their ISP's SMTP server. Some, including
me, have their mail client configured to send using their domain as the
TO: address.
The MX for my primary business domain is directed to a Microsoft
Exchange account elsewhere. Mail from my server is whitelisted at the
Exchange account server. The rest, I forward to Gmail (for filtering)
and download from there.
After disabling default addresses, I had begun installing SPF records on
each account but, after seeing the following comment in an email earlier
this evening, I realized that there may be other things that I should do
before or in addition to an SPF record:
"If you forward spam, and if this spam is reported (for instance to
spamcop) it is your host that ends up blacklisted, not the spammer's
hosts."
I hate to admit it, but I hadn't really thought of that (beyond
disabling the catch-all).
I am a perfectionist but not a pro; I want to configure the server to
cut down on the spoofing; and certainly to minimize or eliminate the
spam being forwarded by my server. I want to do it right from the start
and with a minimum of confusion for you folks helping me... thus the
long email. I also want to document my experience and contribute it to
the SPF site in the hopes that it will help others.
If you had my server setup and could set up the ideal mail handling
configuration, what would YOU do?
Thanks in advance,
Bob G
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