mail servers

Google Apps Domain Create SPF Records For BIND or Djbdns

by on October 19, 2010 · 3 comments

I work for a small business and outsourced our email hosting to Google. However, I noticed that spammers are using our From: First Last to send their spam messages. All bounced messages come to our catch only account. How do I stop this? How do I validate our domain using SPF? How do I configure a SPF for Google Apps domain using BIND 9 or djbdns?

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Postfix Configure Client SMTP Authentication ( Smarthost Authentication )

by on March 12, 2009 · 17 comments

My ISP requires that mail from my dynamic IP to our small business email addresses uses their outgoing SMTP servers. This is probably done to reduce abuse and spam but now I’m not able to send email and local Postfix log file displays authentication failure message. How do I relay mail through my mail ISP servers using Postfix SMTP under Linux / UNIX like operating systems?

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Mail delivery: DNS: Service unavailable error

by on March 4, 2008 · 0 comments

Q. My mail delivery fails with DNS: Service unavailable error. How do I fix this error under Linux / UNIX operating systems?

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