postfix

Q. How do I configure my Postfix mail server to scan incoming mail for spam using DNS Blackhole List such as: a) The Spamhaus b) Open Relay Database etc A. To discard spam or garbage email you can use 3rd party services such as Spamhaus. These are realtime database of IP addresses of verified spam […]

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Q. How do I block all PDF or ZIP files attachments under Postfix Mail Server? A. You can easily block email attachments using mime header check. Open postfix config file Login as the root, enter: # vi /etc/postfix/main.cf Block zip or pdf files Use mime_header_checks postfix config directive, enter: mime_header_checks = regexp:/etc/ostfix/block_attachments Save and close […]

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Q. How do I configure Dovecot IMAPS and POP3s server using SSL certificate? Can I use SSL certificates generated for Postfix mail server? A. Dovecot is an IMAP server for Linux/UNIX-like systems, written with security primarily in mind. It also contains a small POP3 server. It supports mail in either of maildir or mbox formats. […]

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Q. How do I setup cacth-all email accounts under Postfix MTA? For example if an email send to me@domain.com, info@you.com and sales@you.com, should be sent to the same email address. This is useful if anyone of user mistypes an email address when they send it to me, or just guesses at a valid email address, […]

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Q. I’ve Postfix based CentOS Linux server. I need to blacklist email ID: user@abadboy.com . How do I blacklist email address with postfix? I also have spamassassin software installed. A. By default, the Postfix SMTP server accepts any sender address. However you can block / blacklist sender email address easily with Postfix. It has SMTP […]

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Q. I’m running Redhat Enterprise Linux 4.5 server along with Postfix and Cyrus mail server. However I’m getting following error in my log files: Jun 10 18:00:04 server postfix/smtpd[7280]: sql_select option missing Jun 10 18:00:04 server postfix/smtpd[7280]: auxpropfunc error no mechanism available How do I fix this error? I’m not using mysql for postfix. A. […]

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