ssmtp: Cannot open smtp.gmail.com:587

root=XXXXX@gmail.com
mailhub=smtp.gmail.com:587
RewriteDomain=gmail.com
Hostname=localhost
UseTLS=YES
UseSTARTTLS=Yes
AuthUser=XXXXX
AuthPass=XXXXX
FromLineOverride=yes

[root@soupcan sbin]# telnet smtp.gmail.com 587
Trying 74.125.142.108...
Connected to smtp.gmail.com.
Escape character is '^]'.
220 mx.google.com ESMTP l7sm7330049igx.2 - gsmtp
quit
221 2.0.0 closing connection l7sm7330049igx.2 - gsmtp
Connection closed by foreign host.

[root@soupcan sbin]# /usr/sbin/ssmtp -v XXXXX@gmail.com < /home/user/Documents/Scripts/msg.txt
[<-] 220 mx.google.com ESMTP f5sm7367852igc.4 - gsmtp
[->] EHLO localhost
[<-] 250 CHUNKING
[->] STARTTLS
[<-] 220 2.0.0 Ready to start TLS
ssmtp: Cannot open smtp.gmail.com:587

SSL not working: certificate verify failed (20)

TLS_CA_File=/etc/pki/tls/certs/ca-bundle.crt

TLS_CA_File=/etc/pki/tls/certs/ca-bundle.crt

TLS_CA-File=/etc/ssl/certs/ca-certificates.crt

mailhub=smtp.{myserver}.com:587
AuthUser={username}
AuthPass={password}
UseSTARTTLS=YES
UseTLS=NO
TLS_CA_File=/etc/ssl/certs/ca-certificates.crt

root=rpi3abc@gmail
mailhub=smtp.gmail.com:465
FromLineOverride=YES
AuthUser=rpi3abc@gmail.com
AuthPass=testing123
UseTLS=YES