new file mode 100644
--- /dev/null
+++ b/src/imap/ngx_imap.c
@@ -0,0 +1,189 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+#include <ngx_imap.h>
+
+
+static char *ngx_imap_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
+
+
+ngx_uint_t  ngx_imap_max_module;
+
+
+static ngx_command_t  ngx_imap_commands[] = {
+
+    { ngx_string("imap"),
+      NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
+      ngx_imap_block,
+      0,
+      0,
+      NULL },
+
+      ngx_null_command
+};
+
+    
+static ngx_core_module_t  ngx_imap_module_ctx = {
+    ngx_string("imap"),
+    NULL,
+    NULL
+};  
+
+
+ngx_module_t  ngx_imap_module = {
+    NGX_MODULE_V1,
+    &ngx_imap_module_ctx,                  /* module context */
+    ngx_imap_commands,                     /* module directives */
+    NGX_CORE_MODULE,                       /* module type */
+    NULL,                                  /* init module */
+    NULL                                   /* init process */
+};
+
+
+static char *
+ngx_imap_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+    char                        *rv;
+    ngx_uint_t                   m, mi, s;
+    ngx_conf_t                   pcf;
+    ngx_imap_module_t           *module;
+    ngx_imap_conf_ctx_t         *ctx;
+    ngx_imap_core_srv_conf_t   **cscfp;
+    ngx_imap_core_main_conf_t   *cmcf;
+
+    /* the main imap context */
+
+    ctx = ngx_pcalloc(cf->pool, sizeof(ngx_imap_conf_ctx_t));
+    if (ctx == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+    *(ngx_imap_conf_ctx_t **) conf = ctx;
+
+    /* count the number of the http modules and set up their indices */
+
+    ngx_imap_max_module = 0;
+    for (m = 0; ngx_modules[m]; m++) {
+        if (ngx_modules[m]->type != NGX_IMAP_MODULE) {
+            continue;
+        }
+
+        ngx_modules[m]->ctx_index = ngx_imap_max_module++;
+    }
+
+
+    /* the imap main_conf context, it is the same in the all imap contexts */
+
+    ctx->main_conf = ngx_pcalloc(cf->pool,
+                                 sizeof(void *) * ngx_imap_max_module);
+    if (ctx->main_conf == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+
+    /*
+     * the imap null srv_conf context, it is used to merge
+     * the server{}s' srv_conf's
+     */
+
+    ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_imap_max_module);
+    if (ctx->srv_conf == NULL) {
+        return NGX_CONF_ERROR;
+    }
+
+
+    /*
+     * create the main_conf's, the null srv_conf's, and the null loc_conf's
+     * of the all imap modules
+     */
+
+    for (m = 0; ngx_modules[m]; m++) {
+        if (ngx_modules[m]->type != NGX_IMAP_MODULE) {
+            continue;
+        }
+
+        module = ngx_modules[m]->ctx;
+        mi = ngx_modules[m]->ctx_index;
+
+        if (module->create_main_conf) {
+            ctx->main_conf[mi] = module->create_main_conf(cf);
+            if (ctx->main_conf[mi] == NULL) {
+                return NGX_CONF_ERROR;
+            }
+        }
+
+        if (module->create_srv_conf) {
+            ctx->srv_conf[mi] = module->create_srv_conf(cf);
+            if (ctx->srv_conf[mi] == NULL) {
+                return NGX_CONF_ERROR;
+            }
+        }
+    }
+
+
+    /* parse inside the imap{} block */
+
+    pcf = *cf;
+    cf->ctx = ctx;
+
+    cf->module_type = NGX_IMAP_MODULE;
+    cf->cmd_type = NGX_IMAP_MAIN_CONF;
+    rv = ngx_conf_parse(cf, NULL);
+
+    if (rv != NGX_CONF_OK) {
+        *cf = pcf;
+        return rv;
+    }
+
+
+    /* init imap{} main_conf's, merge the server{}s' srv_conf's */
+
+    cmcf = ctx->main_conf[ngx_imap_core_module.ctx_index];
+    cscfp = cmcf->servers.elts;
+
+    for (m = 0; ngx_modules[m]; m++) {
+        if (ngx_modules[m]->type != NGX_IMAP_MODULE) {
+            continue;
+        }
+
+        module = ngx_modules[m]->ctx;
+        mi = ngx_modules[m]->ctx_index;
+
+        /* init imap{} main_conf's */
+
+        if (module->init_main_conf) {
+            rv = module->init_main_conf(cf, ctx->main_conf[mi]); 
+            if (rv != NGX_CONF_OK) {
+                *cf = pcf;
+                return rv;
+            }
+        }
+
+        for (s = 0; s < cmcf->servers.nelts; s++) {
+    
+            /* merge the server{}s' srv_conf's */
+    
+            if (module->merge_srv_conf) {
+                rv = module->merge_srv_conf(cf,
+                                            ctx->srv_conf[mi],
+                                            cscfp[s]->ctx->srv_conf[mi]);
+                if (rv != NGX_CONF_OK) {
+                    *cf = pcf;
+                    return rv;
+                }
+            }
+        }
+    }
+
+    /* imap{}'s cf->ctx was needed while the configuration merging */ 
+    
+    *cf = pcf; 
+
+    return NGX_CONF_OK;
+}