problems in smtp config

[MoisesV]

Estou com um problemas e não consigo resolver, peço ajuda por favor!

Follow my network and smtp settings, notice that when sending an email the domain is not the same configured and I can not revert this configuration.

I ask for help to revert the domain in the sending of emails.

below demonstration of my settings:

VM2(2)sh net

Product:  DECNET        Node:  PSSRV2               Address(es):  1.1
Product:  TCP/IP        Node:  pssrv2.previdenciadosul.com.br Address(es):  10.109.10.34
VM2(2)tcpip
TCPIP> SHOW INTERFACE WE0/full
 Interface: WE0
   IP_Addr: 10.109.10.34      NETWRK: 255.255.255.0     BRDCST: 10.109.10.255
                       Ethernet_Addr: AA-00-04-00-0F-0C    MTU:  1500
     Flags: UP BRDCST RUN MCAST SMPX
                                  RECEIVE        SEND
   Packets                         200590      273331
     Errors                             0           0
   Collisions:                          0
-----------------------------------------------------------------------------------------
TCPIP> SHOW CONFIGURATION NAME_SERVICE

BIND Resolver Configuration

  Transport:  UDP
  Domain:     previdenciadosul.com.br
  Retry:         2
  Timeout:       5
  Servers:    not defined
  Path:       No values defined

-----------------------------------------------------------------------------------------
tcpip sh config smtp

SMTP Configuration
                                                                   Options
Initial interval:   0 00:30:00.00       Address_max:    16       NOEIGHT_BIT
Retry interval:     0 01:00:00.00       Hop_count_max:  16       NORELAY
Maximum interval:   3 00:00:00.00                                TOP_HEADERS

Timeout             Initial       Mail    Receipt       Data  Terminate
  Send:                   5          5          5          3         10
  Receive:                5

Alternate gateway:  10.109.10.30
General gateway:    10.109.10.31

Substitute domain:  PREVIDENCIADOSUL.COM.BR
Zone:               not defined

Postmaster:         TCPIP$SMTP
Log file:           SYS$SPECIFIC:[TCPIP$SMTP]TCPIP$SMTP_LOGFILE.LOG

Generic queue       Queues   Participating nodes

TCPIP$SMTP_PSSRV2_00   1     PSSRV2
-----------------------------------------------------------------------------------------
TCPIP> sh mail/entry=881

  SMTP Mail Queue Entry:   881  User: MOISES
    File: _PSSRV2$DKA500:[USERS.MOISES]18070610292968_MOISES-2CE.TCPIP_PSSRV2;1
    Status: Pending

    Message Headers:

      Return Path: moises@previsul.com.br
      Date:        Fri, 6 Jul 2018 10:29:29 -0300 (BRT)
      Message Id:  <18070610292968_2CE@previsul.com.br>
      From:        moises@previsul.com.br
      To:          souvaz@gmail.com
      Subject:     testing..
      X-VMS-To:    SMTP%"souvaz@gmail.com"
TCPIP>

please help.

Moises Vaz