Download E-books The Book of IMAP: Building a Mail Server with Courier and Cyrus PDF
By Peer Heinlein
IMAP (the net Message entry Protocol) permits consumers to entry their e-mail on a distant server, even if from the place of work, a distant place, or a mobile phone or different equipment. IMAP is strong and versatile, yet it is also advanced to establish; it is more challenging to enforce than POP3 and extra error-prone for either customer and server.
The publication of IMAP deals an in depth creation to IMAP and POP3, the 2 protocols that govern all smooth mail servers and consumers. you are going to learn the way the protocols paintings in addition to the way to set up, configure, and keep the 2 hottest open resource mail structures, Courier and Cyrus.
Authors Peer Heinlein and Peer Hartleben have manage hundreds of thousands of mail servers and supply sensible tricks approximately troubleshooting blunders, migration, filesystem tuning, cluster setups, and password safety that can assist you extricate your self from all kinds of difficult events. you are going to additionally find out how to:
Thoroughly commented references to the POP and IMAP protocols around out the booklet, making The booklet of IMAP a necessary source for even the main skilled process administrators.
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Extra info for The Book of IMAP: Building a Mail Server with Courier and Cyrus
The knowledge kept there depends upon the Unix model. present Linux structures now not require it, so the sector is generally used to save lots of the true identify. nine. four The ÙØ Ù× Ö Module although, this knowledge is presently now not evaluated anyplace within the software code, so that you don't have to supply it. you may also create bills within the Ù× Ö that include an at signal ( ) within the username; this isn't attainable in the event you in simple terms use » Ø »Ô ××Û . should you easily use the e-mail deal with because the account identify, you want to seek advice from the maildir course of the particular account within the Ñ Ð box. The person can then additionally log in together with his or her electronic mail handle. The consumer can be ignorant of the shell account the entry is readdressed to: tux@example. com uid=1001|gid=100|home=/home/tux|shell=/bin/bash|syste mpw=$2a$10$8ZWLc9MOH. vB913PJVR9tuluHdzXc9BBcQ2ZJcAqrDJrUsB9$DvZm|mail=/h ome/tux/Maildir 1001= tux@example. com nine. four. 2 protecting Account info with Ù× Ö you should use any ASCII textual content editor to take care of the Ù× Ö dossier. If, notwithstanding, there are a number of money owed, or in shell scripts, you have to use the Perl script Ù× Ö . It saves attempt in looking the dossier and exams that the syntax within the dossier is right, which prevents attainable mistakes. The × Ø command userdb account_name set field1=value1 field2=value2 ... units the desired fields for command ÓÙÒØÒ Ñ to the desired values. The ÙÒ× Ø userdb accountname unset feld1 feld2 ... deletes the desired fields. The Ð command userdb accountname del deletes the full account, although purely from the Ù× Ö and never from » Ø »Ô ××Û and » Ø »× ÓÛ. The ¹× ÓÛ alternative takes an issue userdb -show accountname and screens the Ù× Ö access for ÓÙÒØÒ Ñ . if you happen to overlook the ÓÙÒØ¹ Ò Ñ argument, Ù× Ö will go back the knowledge for all person money owed. The script additionally acknowledges alternative ¹ »Ô Ø »ØÓ» Ð , which allows a dossier except » Ø » ÙØ Ð »Ù× Ö to be learn out and transformed. therefore, a good way to set the maildir listing for account ØÙÜ Ü ÑÔÐ º ÓÑ to » ÓÑ »ÚÑ Ð»ØÙÜ¹ Ü ÑÔÐ and the person identification and team identity to ¼¼½, the Ù× Ö guide to hold this out runs as follows: 127 9 consumer info linux: # userdb "tux@example. com" set home=/home/vmail/tux-example \ uid=5001 gid=5001 If no worth is unique for a box, Ù× Ö will request one. which means a password may be replaced with out together with it within the name parameters of (which will look within the technique checklist, which within the invocation of Ù× Ö flip should be tested through all approach users). Passwords need to be encrypted ÔÛ software offers and will no longer be laid out in cleartext. The Ù× Ö advice right here. It requests a cleartext password from the traditional enter and places out the hashed model at the commonplace output. it's also effortless to mix with Ù× Ö : linux: # userdbpw | userdb "tux@example. com" set systempw if you happen to make no additional requisites, Ù× Ö ÔÛ makes use of the vintage Ò ÖÝÔØ´µ functionality; when you upload the decision parameters ¹Ñ , ¹ Ñ ¹Ñ ,5 ¹ Ñ ¹× ½, or ¹ Ñ ¹× ¾ ,6 it is going to use different tactics to generate checksums. nine. four. three making a Binary model of the consumer Database Courier doesn't paintings at the Ù× Ö dossier; in its place, it operates with an inÓÛº Ø, which dexed binary model kept in Ù× Ö º Ø and Ù× Ö × is extensively quicker to go looking: Ù× Ö × ÓÛº Ø comprises the passwords, Ù× Ö application creand Ù× Ö º Ø includes the opposite facts.