[BlueOnyx:21484] Re: Outbound on submission port

[Colin Jack]

Hi Michael,
Hi Colin,
    
    
    > We have a number of customers using BX servers for their in-house email
    > servers.
    > 
    > We are now looking at supplying a cloud based filtering service and it
    > requires outbound mail to be sent on the submission port (587) to their
    > servers.
    > 
    > They provide instructions for modifying sendmail.mc but on BX this would
    > be overwritten:
    >
    > For this you have to edit */etc/sendmail.mc* and add the following lines
    > at the top under the "divert(-1)dnl" line:
    > 
    > define(`RELAY_MAILER_ARGS', `TCP $h 587')dnl
    > 
    > define(`SMART_HOST', `[SMART.HOST.TLD]')dnl
    > 
    > Run "sendmailconfig" to use this new configuration. This will
    > automatically re-start sendmail.
    
    
    The SMART_HOST can actually configured via the GUI: "Network Services" /
    "Email", "Advanced"-tab and then "Smart Relay Server".

Yup aware of that – sometimes have to use it if  a server has been blacklisted! (
    
    For the rest: Edit /etc/mail/sendmail.mc and make your changes in there.
    Then run these commands (instead of sendmailconfig):
    
    cd /etc/mail
    make all
    
    That will rebuild the sendmail.cf from it and will restart Sendmail.
    
    To prevent anything from dropping your changes from sendmail.mc you can
    protect it with chattrib:
    
    chattr +i /etc/mail/sendmail.mc
    
Brilliant – thank you.

Regards

Colin