Getting Sendmail to work with Rogers and Smarthost settings

I didn’t do this myself so I can’t vouch for it, but there was a recent discussion on one of the mailing lists I’m on about getting Sendmail to work with Rogers Smarthost settings.

Apparently this howto:

http://www.newthink.net/2007/05/18/smarthost-authentication-with-sendmail/

Will get you going, but there is one critical change you must make as determined by the Hugo on the mailing list.

Don’t forget to use smtp-rog.mail.yahoo.com in authinf and not smtp.broadband.rogers.com!

Also, if you want to use an external authinfo file, add this to your sendmail.mc file.

FEATURE(`authinfo’, `hash -o /etc/mail/authinfo.db’)dnl

Again, I didn’t try this myself, but I know some of you use Rogers and this may come in handy.

Another Reference on SMTP and Rogers Smarthost with Sendmail is here.

This entry was posted on Monday, November 10th, 2008 at 8:13 pm and is filed under Howto, Linux, Tech. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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4 Responses to “Getting Sendmail to work with Rogers and Smarthost settings”

  1. Ash Christopher on November 10th, 2008 at 8:47 pm

    Hi Matt,

    Thanks for the link. I used my setup with rogers without problems for a few months before switching to another service provider due to what I feel was very bad customer service (I am with Teksavvy now – definitely recommend).

    Did Hugo mention why he recommended using smtp-rog.mail.yahoo.com over the others listed at http://www.dslreports.com/faq/rogers/5_Email#5090 ?

    Ash Christopher

  2. Matt G on November 10th, 2008 at 9:38 pm

    Hi Ash,

    I believe it was from the additional information post at the bottom of the article. They mention in the posts there:


    Nov 2 11:53:56 pbx sendmail[2917]: mA2Gru4B002915: to=, ctladdr= (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=120318, relay=smtp-rog.mail.yahoo.com. [206.190.36.18], dsn=5.0.0, stat=Service unavailable

    The delivery attempt went to the server smtp-rog.mail.yahoo.com.
    >

    So, I’m assuming that while you usually use smtp.broadband.rogers.com, the server actual returns smtp-rog.mail.yahoo.com so it won’t match your sendmail configuration for authinfo when it tries to connect.

    You could always try each and if one doesn’t work then you know :)

    HTH,
    Matt

  3. Ash Christopher on November 10th, 2008 at 10:05 pm

    Matt, both smtp-rog.mail.yahoo.com and smtp.broadband.rogers.com allow access to the cluster of mail servers that Rogers uses. When connecting to smtp.broadband.rogers.com you are infact connecting to smtp-rog.mail.yahoo.com – it is just a CNAME.

    21:58 ash@galactica:[~]> dig smtp.broadband.rogers.com
    –snip–
    ;; ANSWER SECTION:
    smtp.broadband.rogers.com. 3402 IN CNAME ssmtp.bloor.is.net.cable.rogers.com.
    ssmtp.bloor.is.net.cable.rogers.com. 86202 IN CNAME smtp-rog.mail.yahoo.com.
    smtp-rog.mail.yahoo.com. 1602 IN A 206.190.36.18

    21:59 ash@galactica:[~]> dig smtp-rog.mail.yahoo.com
    –snip–
    smtp-rog.mail.yahoo.com. 1526 IN A 206.190.36.18

    When testing connections to either dns entry, you get access to any number of smtp servers in their farm.

    smtp105.rog.mail.re2.yahoo.com
    smtp111.rog.mail.re2.yahoo.com
    smtp126.rog.mail.re2.yahoo.com

    and so on. I don’t believe one or the other has anything to do with authentication per se. You will still need to authenticate.

    I do wonder though if smtp.broadband.rogers.com resolves depending on your geographic location (just hazarding a guess based on the CNAME ssmtp.bloor.is.net.cable.rogers.com).

  4. Matt on November 11th, 2008 at 12:03 am

    Good point yeah. I bet it’s GEOIP.

    I didn’t mean you don’t have to authenticate, just that the server you’re authenticating to must be the same in the authinfo config (however, like I said, I haven’t tried this, that’s just what I got from the posts).

    Thanks!
    Matt



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