diff --git a/maillogger/main.py b/maillogger/main.py
index 5ec960d..99058a4 100644
--- a/maillogger/main.py
+++ b/maillogger/main.py
@@ -10,9 +10,14 @@ def main() -> None:
     loader = Loader(options.source_file)
     contents = loader.handle()
 
+    parse_to = True
+    parse_from = True
+    if options.fmt in ("csv", "tsv"):
+        parse_from = False
+
     parsed_contents = []
     for c in contents:
-        result = parse(c)
+        result = parse(c, parse_to, parse_from)
         if result:
             parsed_contents.append(result)
 
diff --git a/maillogger/parser.py b/maillogger/parser.py
index f423b12..040b70a 100644
--- a/maillogger/parser.py
+++ b/maillogger/parser.py
@@ -3,26 +3,34 @@
 from datetime import datetime
 from typing import Dict, Optional
 
+REGEX_PREFIX = r'(?P<month>[A-Z][a-z]{2}) +(?P<day>[0-9]{,2}) ' \
+    + r'(?P<time>[0-9]{2}:[0-9]{2}:[0-9]{2}) (?P<hostname>[A-Za-z0-9-]+) postfix/[a-z/]+\[[0-9]+\]: ' \
+    + r'(?P<mail_id>[A-Z0-9]+): '
 
-REGEX = r'(?P<month>[A-Z][a-z]{2}) (?P<day>[0-9]{,2}) ' \
-    + r'(?P<time>[0-9]{2}:[0-9]{2}:[0-9]{2}) mail postfix/[a-z]+\[[0-9]+\]: ' \
-    + r'(?P<mail_id>[A-Z0-9]+): to=<(?P<to_address>.*@.*)>, ' \
+REGEX_FROM = REGEX_PREFIX \
+    + r'from=<(?P<from_address>.*@.*)>, size=(?P<size>[0-9]+), ' \
+    + r'nrcpt=(?P<nrcpt>[0-9]+) \((?P<description>.*)\)' \
+
+REGEX_TO = REGEX_PREFIX \
+    + r'to=<(?P<to_address>.*@.*)>, ' \
     + r'relay=(?P<relay>.*), delay=(?P<delay>[0-9.]+), ' \
     + r'delays=(?P<delays>[0-9][0-9/.]+), dsn=(?P<dsn>[0-9].[0-9].[0-9]), ' \
     + r'status=(?P<status>(sent|deferred|bounced)) \((?P<description>.*)\)'
-PATTERN = re.compile(REGEX)
+
+PATTERN_FROM = re.compile(REGEX_FROM)
+PATTERN_TO = re.compile(REGEX_TO)
 
 ParseResultType = Dict[str, str]
 
 
-def parse(target: str) -> Optional[ParseResultType]:
+def parse(target: str, parse_to: bool = True, parse_from: bool = True) -> Optional[ParseResultType]:
     """Parse postfix maillog including send status
 
     Args:
         target (str): maillog
 
     Returns:
-        Optional[ParseResultType]: return the following dict if match
+        Optional[ParseResultType]: return one of the following dict if match
 
         {
             'month': 'Aug',
@@ -37,15 +45,30 @@ def parse(target: str) -> Optional[ParseResultType]:
             'status': 'sent',
             'description': 'delivered to maildir'
         }
+
+        {
+            'month': 'Aug',
+            'day': '1',
+            'time': '10:00:00',
+            'mail_id': '677RGS0',
+            'from_address': 'dummy@gmail.com',
+            'size': '12345',
+            'nrcpt': '12',
+            'description': 'delivered to maildir'
+        }
     """
 
-    match_obj = re.search(PATTERN, target)
+    match_from = re.search(PATTERN_FROM, target)
+    match_to = re.search(PATTERN_TO, target)
 
-    if match_obj is None:
-        return None
+    if parse_from and match_from:
+        result = match_from.groupdict()
+        return ParseResultFrom(**result).to_dict()
+    if parse_to and match_to:
+        result = match_to.groupdict()
+        return ParseResultTo(**result).to_dict()
 
-    result = match_obj.groupdict()
-    return ParseResult(**result).to_dict()
+    return None
 
 
 @dataclass
@@ -53,19 +76,14 @@ class ParseResult:
     month: InitVar[str]
     day: InitVar[str]
     time: InitVar[str]
+    hostname: InitVar[str]
 
     mail_id: str
-    to_address: str
-    relay: str
-    delay: str
-    delays: str
-    dsn: str
-    status: str
     description: str
 
     datetime: str = field(init=False)
 
-    def __post_init__(self, month: str, day: str, time: str) -> None:
+    def __post_init__(self, month: str, day: str, time: str, hostname: str) -> None:
         self.datetime = self.convert2dateime(month, day, time)
 
     def to_dict(self) -> ParseResultType:
@@ -73,5 +91,23 @@ def to_dict(self) -> ParseResultType:
 
     @staticmethod
     def convert2dateime(month: str, day: str, time: str) -> str:
+        day = day.rjust(2, '0')
         tmp = datetime.strptime(f'{month}{day}{time}', '%b%d%H:%M:%S')
         return tmp.replace(year=datetime.now().year).strftime('%Y%m%d%H%M%S')
+
+
+@dataclass
+class ParseResultTo(ParseResult):
+    to_address: str
+    relay: str
+    delay: str
+    delays: str
+    dsn: str
+    status: str
+
+
+@dataclass
+class ParseResultFrom(ParseResult):
+    from_address: str
+    size: str
+    nrcpt: str