• rename sample.epub to sample.zip
• unzip sample.zip
• update OEBPS/toc.ncx
• in the folder which include “OEBPS”, “META-INF” and “mimetype”. not the folder which include folder sample
• zip -D -rX9 sample.epub * -x mimetype

…

• see linkfor detail guideline, Archlinux provide dovecot23 as alternative
• add two new configuration, seelink

• dovecot_config_version = 2.4.2
• dovecot_storage_version = 2.4.2

• delete empy dict

#dict {
#quota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext
#expire = sqlite:/etc/dovecot/dovecot-dict-sql.conf.ext
#}

• change “disable_plaintext_auth = yes” to “auth_allow_cleartext = no”, see link
• rename userdb and passdb.

• passdb authenticated the user.
• userdb lookup then retrieves post-login information specific to the authenticated user

userdb passwd {
          #driver = passwd
}
passdb pam {
          #driver = pam
          passdb_driver=pam
}

…

 

fromlink, /var/mail should have correct permissions 2775 root:mail

The first digit “2” represents the setgid (Set Group ID) special permission:

• 2 = setgid bit enabled
• When set on a directory, new files created within inherit the directory’s group ownership
• This ensures all mail files created in /var/mail automatically belong to the mail group

The s represents the setgid bit. It appears in the group execute position:* Normal group permissions: rwx (read, write, execute)

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