diff --git a/go.mod b/go.mod
index f34972e..7e8859f 100644
--- a/go.mod
+++ b/go.mod
@@ -17,6 +17,7 @@ require (
 	github.com/onsi/ginkgo v1.8.0 // indirect
 	github.com/onsi/gomega v1.5.0 // indirect
 	github.com/pkg/errors v0.8.1
+	github.com/rs/zerolog v1.20.0
 	github.com/slack-go/slack v0.6.5
 	github.com/ssor/bom v0.0.0-20170718123548-6386211fdfcf // indirect
 	gomodules.xyz/envconfig v1.3.1-0.20190308184047-426f31af0d45
diff --git a/go.sum b/go.sum
index 16a4784..57c4d47 100644
--- a/go.sum
+++ b/go.sum
@@ -7,6 +7,7 @@ github.com/cenkalti/backoff v2.1.1+incompatible h1:tKJnvO2kl0zmb/jA5UKAt4VoEVw1q
 github.com/cenkalti/backoff v2.1.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
 github.com/codegangsta/inject v0.0.0-20150114235600-33e0aa1cb7c0/go.mod h1:4Zcjuz89kmFXt9morQgcfYZAYZ5n8WHjt81YYWIwtTM=
 github.com/codeskyblue/go-sh v0.0.0-20190412065543-76bd3d59ff27/go.mod h1:VQx0hjo2oUeQkQUET7wRwradO6f+fN5jzXgB/zROxxE=
+github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@@ -74,6 +75,9 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rogpeppe/go-internal v1.1.0 h1:g0fH8RicVgNl+zVZDCDfbdWxAWoAEJyI7I3TZYXFiig=
 github.com/rogpeppe/go-internal v1.1.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
+github.com/rs/xid v1.2.1/go.mod h1:+uKXf+4Djp6Md1KODXJxgGQPKngRmWyn10oCKFzNHOQ=
+github.com/rs/zerolog v1.20.0 h1:38k9hgtUBdxFwE34yS8rTHmHBa4eN16E4DJlv177LNs=
+github.com/rs/zerolog v1.20.0/go.mod h1:IzD0RJ65iWH0w97OQQebJEvTZYvsCUm9WVLWBQrJRjo=
 github.com/slack-go/slack v0.6.5 h1:IkDKtJ2IROJNoe3d6mW870/NRKvq2fhLB/Q5XmzWk00=
 github.com/slack-go/slack v0.6.5/go.mod h1:FGqNzJBmxIsZURAxh2a8D21AnOVvvXZvGligs4npPUM=
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
@@ -96,6 +100,8 @@ golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73r
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3 h1:0GoQqolDA55aaLxZyTzK/Y2ePZzZTUrRacwib7cNsYQ=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859 h1:R/3boaszxrf1GEUWTVDzSKVwLmSJpwZ1yqXm8j0v2QI=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f h1:wMNYb4v58l5UBM7MYRLPG6ZhfOqbKu7X5eyFl8ZhKvA=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58 h1:8gQV6CLnAEikrhgkHFbMAEhagSSnXWGV915qUMm9mrU=
@@ -109,6 +115,8 @@ golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190828213141-aed303cbaa74/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gomodules.xyz/envconfig v1.3.1-0.20190308184047-426f31af0d45 h1:juzzlx91nWAOsHuOVfXZPMXHtJEKouZvY9bBbwlOeYs=
 gomodules.xyz/envconfig v1.3.1-0.20190308184047-426f31af0d45/go.mod h1:41y72mzHT7+jFNgyBpJRrZWuZJcLmLrTpq6iGgOFJMQ=
 gomodules.xyz/version v0.1.0/go.mod h1:Y8xuV02mL/45psyPKG3NCVOwvAOy6T5Kx0l3rCjKSjU=
diff --git a/slack/chat.go b/slack/chat.go
index 8dae65f..0e4b832 100644
--- a/slack/chat.go
+++ b/slack/chat.go
@@ -3,6 +3,11 @@ package slack
 import (
 	"context"
 	"errors"
+	"fmt"
+	"net/http"
+	"net/url"
+
+	"github.com/rs/zerolog/log"
 	"github.com/slack-go/slack"
 	"gomodules.xyz/envconfig"
 	"gomodules.xyz/notify"
@@ -13,11 +18,15 @@ const UID = "slack"
 type Options struct {
 	AuthToken string   `envconfig:"AUTH_TOKEN" required:"true"`
 	Channel   []string `envconfig:"CHANNEL"`
+	ProxyHost string   `envconfig:"PROXY_HOST"`
+	ProxyPort int      `envconfig:"PROXY_PORT"`
 }
 
 type client struct {
-	opt  Options
-	body string
+	opt       Options
+	body      string
+	msg       slack.MsgOption
+	clientOpt *http.Client
 }
 
 var _ notify.ByChat = &client{}
@@ -53,6 +62,20 @@ func (c client) WithBody(body string) notify.ByChat {
 	return &c
 }
 
+func (c client) WithMsgOption(msgOption slack.MsgOption) notify.ByChat {
+	c.msg = msgOption
+	return &c
+}
+
+func (c client) WithProxy(proxyHost string, proxyPort int) notify.ByChat {
+	proxyURL, err := url.Parse(fmt.Sprintf("%v:%v", proxyHost, proxyPort))
+	if err != nil {
+		log.Error().Err(err).Msg("failed to parse URL")
+	}
+	c.clientOpt = &http.Client{Transport: &http.Transport{Proxy: http.ProxyURL(proxyURL)}}
+	return &c
+}
+
 func (c client) To(to string, cc ...string) notify.ByChat {
 	c.opt.Channel = append([]string{to}, cc...)
 	return &c
@@ -74,3 +97,20 @@ func (c *client) Send() error {
 	}
 	return nil
 }
+
+func (c *client) SendAsBlockMessage() error {
+	if len(c.opt.Channel) == 0 {
+		return errors.New("missing to")
+	}
+	s := slack.New(c.opt.AuthToken, slack.OptionHTTPClient(c.clientOpt))
+
+	for _, channel := range c.opt.Channel {
+		if _, _, err := s.PostMessageContext(
+			context.TODO(),
+			channel,
+			c.msg); err != nil {
+			return err
+		}
+	}
+	return nil
+}
diff --git a/types.go b/types.go
index cdb0a78..5df2f36 100644
--- a/types.go
+++ b/types.go
@@ -1,5 +1,7 @@
 package notify
 
+import "github.com/slack-go/slack"
+
 type ByEmail interface {
 	UID() string
 	From(from string) ByEmail
@@ -29,8 +31,11 @@ type ByVoice interface {
 type ByChat interface {
 	UID() string
 	WithBody(body string) ByChat
+	WithProxy(proxyHost string, proxyPort int) ByChat
+	WithMsgOption(msgOption slack.MsgOption) ByChat
 	To(to string, cc ...string) ByChat
 	Send() error
+	SendAsBlockMessage() error
 }
 
 type ByPush interface {