Raspberry 4, send Email from commandline

Question

I have created a crontab for automatic backups of a SQL database and WWW data.

Now I would like to have the result of the crontab automatically sent to me by email. Result of the crontab are created succesfull

I have installed two packages

sudo apt-get install ssmtp
sudo apt-get install mailutils

and edited:

sudo nano /etc/ssmtp/ssmtp.conf

And in Gmail settings, created 2-steps-verification and added App-Pass

TLS_CA_FILE=/etc/ssl/certs/gmail.crt [email protected]
mailhub=smtp.gmail.com:587 rewriteDomain=gmail.com hostname=gmail.com
FromLineOverride=YES [email protected]
AuthPass=oawprowcvxuwlsws UseTLS=Yes UseSTARTTLS=YES

added user to

sudo nano /etc/ssmtp/revaliases
root:[email protected]:smtp.gmail.com:587
www-data:[email protected]:smtp.gmail.com:587
pi:[email protected]:smtp.gmail.com:587

Created certificate

sudo openssl req -new -newkey rsa:4096 -x509 -sha256 -days 365 -nodes -out /etc/ssl/certs/gmail.crt -keyout /etc/ssl/certs/gmail.key

testing ssmtp with

ssmtp -v [email protected]

result is:

[<-] 220 smtp.gmail.com ESMTP r8sm2599022edy.87 - gsmtp 
[->] EHLO gmail.com 
[<-] 250 SMTPUTF8 
[->] STARTTLS 
[<-] 220 2.0.0 Ready to start TLS 
[->] EHLO gmail.com 
[<-] ssmtp: (gmail.com)

Now try to send a Email from commandline

echo "Hello world email body" | mail -s "Test Subject" [email protected]
mail: cannot send message: process exited with a non-zero status

In my logfile /etc/log/mail.log

Sep 25 23:19:40 raspberrypi sSMTP[11592]: Unable to set
TLS_CA_FILE="/etc/ssl/certs/gmail.crt" Sep 25 23:19:40 raspberrypi
sSMTP[11592]: Creating SSL connection to host Sep 25 23:19:41
raspberrypi sSMTP[11592]: SSL connection using
ECDHE_RSA_AES_256_GCM_SHA384 Sep 25 23:19:41 raspberrypi sSMTP[11592]:
(gmail.com)

What is missing or wrong?

• Dougie: raspberrypi.org/forums/…
• Mats Karlsson: Please state which version of OS you are using.
• Seamus: A Python implementation here
• Ingo: Not a question belonging to Raspberry Pi.

Answer 1

ssmtp is deprecated in Buster

See https://raspberrypi.stackexchange.com/a/100704/8697 for alternative

NOTE configuration is different.

• Mats Karlsson: I think @Sama is using a older Raspbian version, hint /etc/log/mail.log
• Sama: Im using Distributor ID: Raspbian Description: Raspbian GNU/Linux 10 (buster) Release: 10 Codename: buster And I changed to msmtp, now its working. Thanks a lot