new file mode 100644
--- /dev/null
+++ b/src/mail/ngx_mail_ssl_module.c
@@ -0,0 +1,393 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_mail.h>
+
+
+#define NGX_DEFLAUT_CERTIFICATE      "cert.pem"
+#define NGX_DEFLAUT_CERTIFICATE_KEY  "cert.pem"
+#define NGX_DEFLAUT_CIPHERS  "ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP"
+
+
+static void *ngx_mail_ssl_create_conf(ngx_conf_t *cf);
+static char *ngx_mail_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child);
+static char *ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd,
+    void *conf);
+
+#if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE)
+
+static char *ngx_mail_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd,
+    void *conf);
+
+static char  ngx_mail_ssl_openssl097[] = "OpenSSL 0.9.7 and higher";
+
+#endif
+
+
+static ngx_conf_enum_t  ngx_http_starttls_state[] = {
+    { ngx_string("off"), NGX_MAIL_STARTTLS_OFF },
+    { ngx_string("on"), NGX_MAIL_STARTTLS_ON },
+    { ngx_string("only"), NGX_MAIL_STARTTLS_ONLY },
+    { ngx_null_string, 0 }
+};
+
+
+
+static ngx_conf_bitmask_t  ngx_mail_ssl_protocols[] = {
+    { ngx_string("SSLv2"), NGX_SSL_SSLv2 },
+    { ngx_string("SSLv3"), NGX_SSL_SSLv3 },
+    { ngx_string("TLSv1"), NGX_SSL_TLSv1 },
+    { ngx_null_string, 0 }
+};
+
+
+static ngx_command_t  ngx_mail_ssl_commands[] = {
+
+    { ngx_string("ssl"),
+      NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
+      ngx_conf_set_flag_slot,
+      NGX_MAIL_SRV_CONF_OFFSET,
+      offsetof(ngx_mail_ssl_conf_t, enable),
+      NULL },
+
+    { ngx_string("starttls"),
+      NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_enum_slot,
+      NGX_MAIL_SRV_CONF_OFFSET,
+      offsetof(ngx_mail_ssl_conf_t, starttls),
+      ngx_http_starttls_state },
+
+    { ngx_string("ssl_certificate"),
+      NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_str_slot,
+      NGX_MAIL_SRV_CONF_OFFSET,
+      offsetof(ngx_mail_ssl_conf_t, certificate),
+      NULL },
+
+    { ngx_string("ssl_certificate_key"),
+      NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_str_slot,
+      NGX_MAIL_SRV_CONF_OFFSET,
+      offsetof(ngx_mail_ssl_conf_t, certificate_key),
+      NULL },
+
+    { ngx_string("ssl_protocols"),
+      NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_1MORE,
+      ngx_conf_set_bitmask_slot,
+      NGX_MAIL_SRV_CONF_OFFSET,
+      offsetof(ngx_mail_ssl_conf_t, protocols),
+      &ngx_mail_ssl_protocols },
+
+    { ngx_string("ssl_ciphers"),
+      NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_str_slot,
+      NGX_MAIL_SRV_CONF_OFFSET,
+      offsetof(ngx_mail_ssl_conf_t, ciphers),
+      NULL },
+
+    { ngx_string("ssl_prefer_server_ciphers"),
+      NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_FLAG,
+#ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
+      ngx_conf_set_flag_slot,
+      NGX_MAIL_SRV_CONF_OFFSET,
+      offsetof(ngx_mail_ssl_conf_t, prefer_server_ciphers),
+      NULL },
+#else
+      ngx_mail_ssl_nosupported, 0, 0, ngx_mail_ssl_openssl097 },
+#endif
+
+    { ngx_string("ssl_session_cache"),
+      NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE12,
+      ngx_mail_ssl_session_cache,
+      NGX_MAIL_SRV_CONF_OFFSET,
+      0,
+      NULL },
+
+    { ngx_string("ssl_session_timeout"),
+      NGX_MAIL_MAIN_CONF|NGX_MAIL_SRV_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_sec_slot,
+      NGX_MAIL_SRV_CONF_OFFSET,
+      offsetof(ngx_mail_ssl_conf_t, session_timeout),
+      NULL },
+
+      ngx_null_command
+};
+
+
+static ngx_mail_module_t  ngx_mail_ssl_module_ctx = {
+    NULL,                                  /* create main configuration */
+    NULL,                                  /* init main configuration */
+
+    ngx_mail_ssl_create_conf,              /* create server configuration */
+    ngx_mail_ssl_merge_conf                /* merge server configuration */
+};
+
+
+ngx_module_t  ngx_mail_ssl_module = {
+    NGX_MODULE_V1,
+    &ngx_mail_ssl_module_ctx,              /* module context */
+    ngx_mail_ssl_commands,                 /* module directives */
+    NGX_MAIL_MODULE,                       /* module type */
+    NULL,                                  /* init master */
+    NULL,                                  /* init module */
+    NULL,                                  /* init process */
+    NULL,                                  /* init thread */
+    NULL,                                  /* exit thread */
+    NULL,                                  /* exit process */
+    NULL,                                  /* exit master */
+    NGX_MODULE_V1_PADDING
+};
+
+
+static ngx_str_t ngx_mail_ssl_sess_id_ctx = ngx_string("MAIL");
+
+
+static void *
+ngx_mail_ssl_create_conf(ngx_conf_t *cf)
+{
+    ngx_mail_ssl_conf_t  *scf;
+
+    scf = ngx_pcalloc(cf->pool, sizeof(ngx_mail_ssl_conf_t));
+    if (scf == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    /*
+     * set by ngx_pcalloc():
+     *
+     *     scf->protocols = 0;
+     *     scf->certificate.len = 0;
+     *     scf->certificate.data = NULL;
+     *     scf->certificate_key.len = 0;
+     *     scf->certificate_key.data = NULL;
+     *     scf->ciphers.len = 0;
+     *     scf->ciphers.data = NULL;
+     *     scf->shm_zone = NULL;
+     */
+
+    scf->enable = NGX_CONF_UNSET;
+    scf->starttls = NGX_CONF_UNSET;
+    scf->prefer_server_ciphers = NGX_CONF_UNSET;
+    scf->builtin_session_cache = NGX_CONF_UNSET;
+    scf->session_timeout = NGX_CONF_UNSET;
+
+    return scf;
+}
+
+
+static char *
+ngx_mail_ssl_merge_conf(ngx_conf_t *cf, void *parent, void *child)
+{
+    ngx_mail_ssl_conf_t *prev = parent;
+    ngx_mail_ssl_conf_t *conf = child;
+
+    ngx_pool_cleanup_t  *cln;
+
+    ngx_conf_merge_value(conf->enable, prev->enable, 0);
+    ngx_conf_merge_value(conf->starttls, prev->starttls, NGX_MAIL_STARTTLS_OFF);
+
+    if (conf->enable == 0 && conf->starttls == NGX_MAIL_STARTTLS_OFF) {
+        return NGX_CONF_OK;
+    }
+
+    ngx_conf_merge_value(conf->session_timeout,
+                         prev->session_timeout, 300);
+
+    ngx_conf_merge_value(conf->prefer_server_ciphers,
+                         prev->prefer_server_ciphers, 0);
+
+    ngx_conf_merge_bitmask_value(conf->protocols, prev->protocols,
+                         (NGX_CONF_BITMASK_SET
+                          |NGX_SSL_SSLv2|NGX_SSL_SSLv3|NGX_SSL_TLSv1));
+
+    ngx_conf_merge_str_value(conf->certificate, prev->certificate,
+                             NGX_DEFLAUT_CERTIFICATE);
+
+    ngx_conf_merge_str_value(conf->certificate_key, prev->certificate_key,
+                             NGX_DEFLAUT_CERTIFICATE_KEY);
+
+    ngx_conf_merge_str_value(conf->ciphers, prev->ciphers, NGX_DEFLAUT_CIPHERS);
+
+
+    conf->ssl.log = cf->log;
+
+    if (ngx_ssl_create(&conf->ssl, conf->protocols, NULL) != NGX_OK) {
+        return NGX_CONF_ERROR;
+    }
+
+    cln = ngx_pool_cleanup_add(cf->pool, 0);
+    if (cln == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    cln->handler = ngx_ssl_cleanup_ctx;
+    cln->data = &conf->ssl;
+
+    if (ngx_ssl_certificate(cf, &conf->ssl, &conf->certificate,
+                            &conf->certificate_key)
+        != NGX_OK)
+    {
+        return NGX_CONF_ERROR;
+    }
+
+    if (conf->ciphers.len) {
+        if (SSL_CTX_set_cipher_list(conf->ssl.ctx,
+                                   (const char *) conf->ciphers.data)
+            == 0)
+        {
+            ngx_ssl_error(NGX_LOG_EMERG, cf->log, 0,
+                          "SSL_CTX_set_cipher_list(\"%V\") failed",
+                          &conf->ciphers);
+        }
+    }
+
+#ifdef SSL_OP_CIPHER_SERVER_PREFERENCE
+
+    if (conf->prefer_server_ciphers) {
+        SSL_CTX_set_options(conf->ssl.ctx, SSL_OP_CIPHER_SERVER_PREFERENCE);
+    }
+
+#endif
+
+    if (ngx_ssl_generate_rsa512_key(&conf->ssl) != NGX_OK) {
+        return NGX_CONF_ERROR;
+    }
+
+    ngx_conf_merge_value(conf->builtin_session_cache,
+                         prev->builtin_session_cache,
+                         NGX_SSL_DFLT_BUILTIN_SCACHE);
+
+    if (conf->shm_zone == NULL) {
+        conf->shm_zone = prev->shm_zone;
+    }
+
+    if (ngx_ssl_session_cache(&conf->ssl, &ngx_mail_ssl_sess_id_ctx,
+                              conf->builtin_session_cache,
+                              conf->shm_zone, conf->session_timeout)
+        != NGX_OK)
+    {
+        return NGX_CONF_ERROR;
+    }
+
+    return NGX_CONF_OK;
+}
+
+
+static char *
+ngx_mail_ssl_session_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+    ngx_mail_ssl_conf_t  *scf = conf;
+
+    size_t       len;
+    ngx_str_t   *value, name, size;
+    ngx_int_t    n;
+    ngx_uint_t   i, j;
+
+    value = cf->args->elts;
+
+    for (i = 1; i < cf->args->nelts; i++) {
+
+        if (ngx_strcmp(value[i].data, "builtin") == 0) {
+            scf->builtin_session_cache = NGX_SSL_DFLT_BUILTIN_SCACHE;
+            continue;
+        }
+
+        if (value[i].len > sizeof("builtin:") - 1
+            && ngx_strncmp(value[i].data, "builtin:", sizeof("builtin:") - 1)
+               == 0)
+        {
+            n = ngx_atoi(value[i].data + sizeof("builtin:") - 1,
+                         value[i].len - (sizeof("builtin:") - 1));
+
+            if (n == NGX_ERROR) {
+                goto invalid;
+            }
+
+            scf->builtin_session_cache = n;
+
+            continue;
+        }
+
+        if (value[i].len > sizeof("shared:") - 1
+            && ngx_strncmp(value[i].data, "shared:", sizeof("shared:") - 1)
+               == 0)
+        {
+            len = 0;
+
+            for (j = sizeof("shared:") - 1; j < value[i].len; j++) {
+                if (value[i].data[j] == ':') {
+                    break;
+                }
+
+                len++;
+            }
+
+            if (len == 0) {
+                goto invalid;
+            }
+
+            name.len = len;
+            name.data = value[i].data + sizeof("shared:") - 1;
+
+            size.len = value[i].len - j - 1;
+            size.data = name.data + len + 1;
+
+            n = ngx_parse_size(&size);
+
+            if (n == NGX_ERROR) {
+                goto invalid;
+            }
+
+            if (n < (ngx_int_t) (8 * ngx_pagesize)) {
+                ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                                   "session cache \"%V\" is too small",
+                                   &value[i]);
+
+                return NGX_CONF_ERROR;
+            }
+
+            scf->shm_zone = ngx_shared_memory_add(cf, &name, n,
+                                                   &ngx_mail_ssl_module);
+            if (scf->shm_zone == NULL) {
+                return NGX_CONF_ERROR;
+            }
+
+            continue;
+        }
+
+        goto invalid;
+    }
+
+    if (scf->shm_zone && scf->builtin_session_cache == NGX_CONF_UNSET) {
+        scf->builtin_session_cache = NGX_SSL_NO_BUILTIN_SCACHE;
+    }
+
+    return NGX_CONF_OK;
+
+invalid:
+
+    ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                       "invalid session cache \"%V\"", &value[i]);
+
+    return NGX_CONF_ERROR;
+}
+
+
+#if !defined (SSL_OP_CIPHER_SERVER_PREFERENCE)
+
+static char *
+ngx_mail_ssl_nosupported(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+    ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                       "\"%V\" directive is available only in %s,",
+                       &cmd->name, cmd->post);
+
+    return NGX_CONF_ERROR;
+}
+
+#endif