On Saturday, October 30, 2010 22:30:40 Kevin J. Cummings wrote:
On 10/30/2010 06:16 PM, Hiisi Troll wrote:
In the provided sendmail.mc file there's an option: define(`SMART_HOST', `smtp.direct.ru')dnl I thought it relays all my outgoing mail to ISP smtp server. Or am I wrong here?
Try putting the smtp machine name between square brackets:
define(`SMART_HOST', `[smtp.direct.ru]')dnl
there is something about the square brackets and its use to either use or keep sendmail from using the MX or an A record instead for the listed host (sorry, I can't remember the details, only that it works!). I use it (the square brackets) for my ISP's smtp server and I can send email out through it.
The meaning of SMART_HOST is the *MX* host for the name. In other words, sendmail will look up the MX record for smtp.direct.ru to find out what host to connect to.
The MX record *could* specify another host -- not smtp.direct.ru . (In this case, there is no MX record for smtp.direct.ru so its A record will be used, which is what you want.) My ISP's relay host does specify a different host for its MX. That host refuses relay from my IP address.
To specify a host address instead of the MX host for a domain, place the host address inside of square brackets as Kevin states above. Now even if an MX record someday shows up for that domain name (smtp.direct.ru), its A record will still be used.