[ale] Bellsouth Sendmail Fix

Geoffrey esoteric at 3times25.net
Wed Jul 2 06:55:20 EDT 2003


So where have you placed your mini-howto?  Submitted it to ldp yet? :)

Ryan Neily wrote:
> If this gets posted, I've fixed the Bellsouth no-relay problem that people
> has been complaining about.  I used some of the tips of James CE Johnson
> which is using Postfix.  My solution is using Sendmail, but works much the
> same...
> 
> I added a redirect rule to my IPtables firewall script that redirects any
> traffic coming from port 26 on the localhost interface to the bellsouth
> SMTP server on port 25.  I used this iptables command:
> 
> $IPTABLES -t nat -A OUTPUT -p tcp -d 127.0.0.1 --dport 26 -j DNAT
> --to-destination 205.152.59.16:25
> 
> and then added the following directives to my sendmail.mc, m4'd it to
> sendmail.cf and it seems to be working:
> 
> 
> # This makes sendmail send everything on port 26
> define(`SMTP_MAILER_ARGS', `TCP $h 26')
> 
> # This sets up the SMART_HOST to be the "localhost" which is Bellsouth
> # Keep in mind there are a few other commands to setup SMART_HOST
> define(`SMART_HOST',`localhost')dnl
> 
> The only reason why i think this works is because the Bellsouth SMTP
> server sees the mail coming from a loopback addres, and thinks it's fine
> instead of coming from an IP address on the Bellsouth dialup namespace.
> 
> This is kinda strange, and I am not sure why it works...
> 

-- 
Until later: Geoffrey		esoteric at 3times25.net

The latest, most widespread virus?  Microsoft end user agreement.
Think about it...

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