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基本的なIMAPプロキシについて、nginx.confは以下のようでなければなりません:
mail {
#auth_http unix:/path/socket:/cgi-bin/auth;
auth_http localhost:9000/cgi-bin/auth;
proxy on;
imap_capabilities "IMAP4rev1" "UIDPLUS"; ## default
server {
listen 143;
protocol imap;
}
## uncomment to enable POP3 proxy
# pop3_capabilities "TOP" "USER";
# server {
# listen 110;
# protocol pop3;
# }
}
STARTTLSサポートを使ったIMAPプロキシを設定するには、このようなnginx.confを使います:
mail {
#auth_http unix:/path/socket:/cgi-bin/auth;
auth_http localhost:9000/cgi-bin/auth;
proxy on;
starttls on; ## enable STARTTLS for all mail servers
# The SSL part can be put in a separate configuration file,
# e.g., in the case of an SSL offloader / caching proxy.
# In that case, only the ssl_certificate* needs to be set here (or in server block.)
# The config assumes certificates in /etc/nginx/ssl/ and
# private keys in /etc/nginx/ssl/private/
ssl on;
ssl_prefer_server_ciphers on;
ssl_protocols TLSv1 SSLv3;
ssl_ciphers HIGH:!ADH:!MD5:@STRENGTH;
ssl_session_cache shared:TLSSL:16m;
ssl_session_timeout 10m;
## default SSL cert. 各ホストは独自のものを持つ必要があります。
ssl_certificate ssl/wildcard.crt;
ssl_certificate_key ssl/private/wildcard.key;
## default, STARTTLS is appended because of starttls directive above
imap_capabilities "IMAP4rev1" "UIDPLUS";
server {
listen 143;
protocol imap;
server_name mx.example.org;
}
## uncomment to enable POP3 proxy
# pop3_capabilities "TOP" "USER";
# server {
# listen 110;
# protocol pop3;
# }
}
注意
linux上でNGINXを使っている場合は、メールオプションを付けて./configure
を実行する必要があります。
./configure --with-mail --with-mail_ssl_module
(httpプロキシを必要としない場合は、--without-http
を使うことも考慮してください)