RE: [vps-mail] port 5190 is blocked now too

["Jim Smith" <maillists@xxxxxxxxxxxxxxxx>]

I was looking for something else and stumbled across this "simple fix" for
the port 25 problem. Since I am script-challenged and have limited knowledge
about sendmail, I thought I'd post it here for opinions from anyone more
knowledgeable on sendmail stuff. I can't find if this is dated so it may
have been useful a couple of years ago and outdated now. The URL I found it
is at http://www.macdevcenter.com/pub/a/mac/2002/09/10/sendmail.html?page=5.


Is this really the silver bullet to fix the port problem?...

-----------------------------
Working with Lame ISPs

What do I mean by "Lame ISPs?" Well, I mean those ISPs that block all
outgoing traffic on port 25. Instead of letting you have access to the
Internet on port 25, they want you to use their own mail server. They do
this to try to stop spammers from utilizing open relays on their networks.
However, this means that your mail server can't send mail to other hosts on
the Internet.

Luckily, since sendmail is the swiss army knife of mail servers, there is a
configuration directive to fix this. To have all mail from your server go
through your ISP's mail server, edit your /etc/mail/config.mc file to match
the following:

% sudo emacs /etc/mail/config.mc

VERSIONID(`$Id: generic-darwin.mc,v 1.3 2002/04/12 18:41:47 bbraun Exp $')
OSTYPE(darwin)dnl
DOMAIN(generic)dnl
undefine(`ALIAS_FILE')
define(`PROCMAIL_MAILER_PATH',`/usr/bin/procmail')
define(`confDONT_BLAME_SENDMAIL', `GroupWritableDirPathSafe')
define(`LUSER_RELAY', `local:duncan')
define(`confDOMAIN_NAME', `$w.domain.com')
define(`SMART_HOST' `mail.mindspring.com')
FEATURE(`smrsh',`/usr/libexec/smrsh')
FEATURE(local_procmail)
FEATURE(`virtusertable',`hash -o /etc/mail/virtusertable')dnl
FEATURE(`genericstable', `hash -o /etc/mail/genericstable')dnl 
FEATURE(`mailertable',`hash -o /etc/mail/mailertable')dnl
FEATURE(`access_db')dnl
MAILER(smtp)
MAILER(procmail)

Once again, run the update script:

% sudo ./update
Regenerating sendmail.cf
Restarting mail services

Problem solved. 
-----------------------

Is it really solved?

Jim Smith


> -----Original Message-----
> From: owner-vps-mail@xxxxxxxxxxxx 
> [mailto:owner-vps-mail@xxxxxxxxxxxx] On Behalf Of Mark A. Sharkey
> Sent: Friday, July 08, 2005 4:07 PM
> To: vps-mail@xxxxxxxxxxxx
> Subject: [vps-mail] port 5190 is blocked now too
> 
> Hello,
> 
> As more and more ISP's starting blocking port 25 for outgoing 
> mail, we 
> began telling all our clients to simply use port 5190 and all 
> was fine. 
>   Now we are finding some ISP's that are blocking that port 
> as well.  In 
> these cases, I have told the client that they simply will have to use 
> their ISP for outgoing mail from now one.  However, I'm 
> wondering if an 
> alternate solution might be to add yet another port number 
> that sendmail 
> listens on.  Has anyone tried this?  Have the isp's 'caught on'?  If 
> you've done this, how easy is it to implement and does subsequent 
> upgrades to sendmail impact the changes?
> 
> Thanks!
> 
> Mark
> 
> 
> -- 
> vps1 -> vps2 migrations for only $429.00!
> 
> Mark A. Sharkey
> PrecisionPros.com Network
> 6543 East Omega Street
> Mesa, Arizona 85215
> 800 844 4434 toll free
> 480 461 9765 local
> 480 461 9312 fax
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