Linux Mail Delivery Failed With DNS Service Unavailable Error and Solution
I get following error message for my postfix email server: "Mail Delivery Failed With DNS Service Unavailable Error and Solution". How do I fix this problem? The post Linux Mail Delivery Failed With...
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Mail delivery: DNS: Service unavailable error
Q. My mail delivery fails with DNS: Service unavailable error. How do I fix this error under Linux / UNIX operating systems? The post Mail delivery: DNS: Service unavailable error appeared first on...
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Dedicated Server Hosting
Q. We have decided to move to Linux and brought a dedicated Dell server preinstalled with Red Hat Linux for hosting our small business website. Can you tell me what software required to run on a Linux...
View ArticleLinux Restart IMAP Services ( dovecot IMAP server )
How do I restart dovecot IMAP4 / IMAP (Internet Message Access Protocol) under RHEL / CentOS / Fedora / Debian / Ubutnu Linux? The post Linux Restart IMAP Services ( dovecot IMAP server ) appeared...
View ArticlePostfix SASL ERROR: Password not accepted from server: 535 5.7.0 Error:...
Q. I’ve recently changed email user account password using passwd command, for one my postfix email server which requires SMTP authentication before sending an email. Now following error is logged into...
View ArticleBind Postfix Mail Server To Localhost or Specific IP Address Only
How do I bind Postfix MTA to specific IP address such as 127.0.0.1 or 202.5.1.2? The post Bind Postfix Mail Server To Localhost or Specific IP Address Only appeared first on nixCraft.
View ArticleDNS Name Resolution
Can you explain DNS name resolution concept? Why I need to set DNS resolution for my Windows or Linux server? How do I setup DNS name resolution under Linux / UNIX server system? The post DNS Name...
View ArticleDebian / Ubuntu Linux: Send Automatic Email Notification When Security...
How do I force apt-get to send me email when upgrades or security updates available under Debian or Ubuntu Linux? Do I need to write a shell script which generates a mail with a list of all packages...
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PHP Send Email
Q. How do I send an email using PHP and Apache webserver under Linux / UNIX operating systems? How do I send email from a PHP Script? The post PHP Send Email appeared first on nixCraft.
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FreeBSD Install FuzzyOCR To Detect Image Spam
Q. How do I install FuzzyOcr plugin for SpamAssassin to detect unsolicited bulk mail (Spam) containing images as the main content for Postfix mail server? The post FreeBSD Install FuzzyOCR To Detect...
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Postfix Configure Client SMTP Authentication ( Smarthost Authentication )
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...
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Postfix Configure Multiple ISP Client SMTP Authentication
How do I support multiple ISP accounts in the Postfix SMTP client (smarthost) for relaying email? For example: [a] user1@isp1.com must be relay via smtp.isp1.com. [b] user1@isp2.com must be relay via...
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Postfix Backup MX eMail Server Anti-Spam Configuration
According to RFC2821 the lowest-numbered records are the most preferred MX for domain. So I've a target Postfix backup server to keep the messages in a queue waiting for the primary server to become...
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Postfix mail for domain.com loops back to myself Error and Solution
I can send and receive mail using user@example.com, but system generated emails such as root@mail.example.com bounce backup with an error: May 1 03:14:52 mail postfix/smtp[62798]: 23CA4BD6B40: to=,...
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SPAMHAUS BLOCKLIST ADDRESS IS WRONG MUST FIX Error and Solution
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...
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Postfix Hide Client (MUA) System IP Address / Hostname
I've central mail server gateway. All of our internal systems through this box. How do I remove or hide the hostnames and IP addresses of our internal systems from the messages headers before they go...
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Postfix Forward Email To Another Email Account
I've multiple virtual domain hosted on CentOS Postfix server. How do I forward selected virtual domain email to yahoo / gmail or other email account using Postfix email server? The post Postfix...
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Linux Configure Sendmail as SMTP Mail Client ( submission MTA )
I've central e-mail server. Other servers does not need to operate as a mail server. How do I configure Sendmail as submission-only e-mail server (mail client) under CentOS / Fedora / RHEL / Debian...
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Start / Stop / Restart Postfix Mail Server
How do I start / stop / restart my postfix mail server under Linux or UNIX operating systems? The post Start / Stop / Restart Postfix Mail Server appeared first on nixCraft.
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How to configure Postfix relayhost (smarthost) to send eMail using an...
How do I configure Postfix MTA to send eMail using an external cloud-based SMTP server (with username: password) from a web server on Linux or Unix-like system? How do I configure an Ubuntu server and...
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