Philip Hazel - Exim: The Mail Transfer Agent |
Exim delivers electronic mail, both local and remote. It has all the virtues of a good postman: it s easy to talk to, reliable, efficient, and eager to accommodate even the most complex special requests. It s the default mail transport agent installed on some Ëèíóêñ systems, runs on many versions of Unix, and is suitable for any TCP/IP network with any combination of hosts and end-user mail software. Exim is growing in popularity because it is open source, scalable, and rich in features such as the following:
- Compatibility with the calling interfaces and options of Sendmail (for which Exim is usually a drop-in replacement) - Lookups in LDAP servers, MySQL and PostgreSQL databases, and NIS or NIS+ services - Support for many kinds of address parsing, including regular expressions that are compatible with Perl 5 - Sophisticated error handling - Innumerable tuning parameters for improving performance and handling enormous volumes of mail Best of all, Exim is easy to configure. You never have to deal with ruleset 3 or worry that a misplaced asterisk will cause an inadvertent mail bomb. While a basic configuration is easy to read and can be created quickly, Exim s syntax and behavior do get more subtle as you enter complicated areas like virtual hosting, filtering, and automatic replies. This book is a comprehensive survey that provides quick information for people in a hurry as well as thorough coverage of more advanced material. |