Install ssmtp with the following commands:

sudo apt-get update
sudo apt-get install ssmtp

Open file ssmtp.conf and re-adjust

sudo nano /etc/ssmtp/ssmtp.conf

Login Cpanel hosting, establish mail from a host, and set up a password for the sender's email. Please ensure that mailbox [email protected] existed in Share-hosting.

[email protected]
mailhub=mail.flagtick.com:465
FromLineOverride=YES
[email protected]
AuthPass=xxxxxxxx
UseTLS=YES
hostname=flagtick.com

Notice: The configuration gets from outgoing or outbound was that mean sending from the system. Please make sure recipient

Outgoing Server:	mail.flagtick.com
SMTP Port: 465

Tesing mailserver with telnet

telnet mail.flagtick.com 465

Testing by carrying out of sending email [email protected] or [email protected]. Carry out of pressing Shortcut Ctrl + D to close composing.

ssmtp -v [email protected] or ssmtp -v [email protected]

Frankly speaking, the mailbox recipient is Gmail can be ignored by the sender (Email Share-hosting free).

This is first message
[<-] 220 and/or bulk e-mail.
[->] EHLO flagtick.com
[<-] 250 HELP
[->] AUTH LOGIN
[<-] 334 VXNlcm5hbWU6
[->] bG9yZW5jZUBmbGFndGljay5jb20=
[<-] 334 UGFzc3dvcmQ6
[<-] 235 Authentication succeeded
[->] MAIL FROM:<[email protected]>
[<-] 250 OK
[->] RCPT TO:<[email protected]>
[<-] 250 Accepted
[->] DATA
[<-] 354 Enter message, ending with "." on a line by itself
[->] Received: by flagtick.com (sSMTP sendmail emulation); Mon, 17 Jan 2022 12:15:02 +0700
[->] From: [email protected]
[->] Date: Mon, 17 Jan 2022 12:15:02 +0700
[->] This is first message
[->]
[->] .
[<-] 250 OK id=1n9KMI-000E4A-18
[->] QUIT
[<-] 221 hv23-24822.azdigihost.com closing connection