mail server

Sendmail: Clear / Delete / Flush Mail Queue

by Vivek Gite on July 1, 2011 · 4 comments

How can I permanently delete all e-mail messages in the Sendmail mail server (SMTP) queue using UNIX / Linux command prompt?

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Linux / UNIX: PHP mail() Error Log File

by Vivek Gite on November 12, 2010 · 1 comment

How do I view PHP mail() errors? How do I see php mail() error log file under UNIX or Linux?

{ 1 comment }

Linux / UNIX: DNS Lookup Command

by Vivek Gite on November 8, 2010 · 5 comments

How do I perform dns lookup under Linux or UNIX or OS X operating systems without using 3rd party web sites for troubleshooting DNS usage?

{ 5 comments }

Google Apps Domain Create SPF Records For BIND or Djbdns

by Vivek Gite 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?

{ 3 comments }

Start / Stop / Restart Postfix Mail Server

by Vivek Gite on December 3, 2009 · 2 comments

How do I start / stop / restart my postfix mail server under Linux or UNIX operating systems?

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SPAMHAUS BLOCKLIST ADDRESS IS WRONG MUST FIX Error and Solution

by Vivek Gite on May 7, 2009 · 1 comment

I‘ve configured RBL for my postfix based mail server and I’m getting an error that read as follows:

May 3 04:35:37 mx02 postfix/smtpd[10956]: NOQUEUE: reject: RCPT from ant251.neoplus.adsl.tpnet.pl[83.26.101.251]: 554 5.7.1 Service unavailable; Client host [83.26.101.251] blocked using xen.spamhaus.org; SPAMHAUS BLOCKLIST ADDRESS IS WRONG MUST FIX; from= to= proto=ESMTP helo=

How do I fix this problem?

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What is the difference between authentication and authorization?

by Vivek Gite on March 13, 2009 · 6 comments

What is the difference between authentication and authorization? Why it is important to understand difference between two?

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