Questions[ssmtp](ubuntu)

I setup ssmtp to send email messages from my Ubuntu server to an external email address.

Using the mail command of the mailutils package, I am able to receive emails from my server sent via :

$echo test | mail -s test [email protected]

What I want to do now, is to send any message addressed to user root (like alerts and so on) to [email protected].

$echo test | mail -s test root

One of the most promissing solutions I found so far is :

sSMTP revaliases, aliases and mail.rc

As ssmtp is not able to forward and alias, the article tells one to use mail to alias addresses. But this also doesn't work. Indeed, I do not even have an /etc/mail.rc file in my filesystem.

It seems like the email has left the host, but never reaches the remote mail address.

Apr 19 19:46:16 hostname sSMTP[1160]: Creating SSL connection to host
Apr 19 19:46:16 hostname sSMTP[1160]: SSL connection using ECDHE_RSA_AES_256_GCM_SHA384
Apr 19 19:46:17 hostname sSMTP[1160]: Sent mail for [email protected] (221 2.0.0 Bye) uid=0 username=root outbytes=459

So far the summary. Now to the Question :

How to setup ssmtp and mail so that

$echo test | mail -s test root

will successfully send an email sent to root to an alias of root ?

Actually, I'm using a RaspberryPI 3b.
This is my /etc/ssmtp/ssmtp.conf:

[email protected]
mailhub=smtp.gmail.com:587
rewriteDomain=gmail.com
hostname=raspi
FromLineOverride=YES
UseTLS=Yes
UseSTARTTLS=YES
AuthUser=gmail_user
AuthPass=PASSWD

This is my /etc/ssmtp/revaliases:

root:[email protected]:smtp.gmail.com:587
pi:[email protected]:smtp.gmail.com:587

Trying to send a mail:

root@raspberrypi:~# echo "hola" | ssmtp [email protected] -v
[<-] 220 smtp.gmail.com ESMTP x129sm89284054wmg.44 - gsmtp
[->] EHLO raspi
[<-] 250 SMTPUTF8
[->] STARTTLS
[<-] 220 2.0.0 Ready to start TLS
[->] EHLO raspi
[<-]
ssmtp:  (raspi)

hostname:

root@raspberrypi:~# hostname
raspberrypi

This is a ping to google and the DNS servers that I'm using:

root@raspberrypi:~# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=54 time=13.1 ms
^C
--- 8.8.8.8 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 13.134/13.134/13.134/0.000 ms
root@raspberrypi:~# cat /etc/resolv.conf
# Generated by resolvconf
nameserver 8.8.8.8
nameserver 8.8.4.4

Also...

• the GMail account have the thing to let less secure applications use the account.
• to make sure the name and password where correct, used copy/paste to google Chrome (Using SSH, so that I can copy/paste things)
• I have a Debian server which works well, also trying to copy/paste all the configuration and change the names from users and hostname, but it didn't work.

I use SSMTP on many of our servers. As of June 6th 2019 I can no longer get SSMTP on any of my ubuntu servers to send email. I have some raspberry pies using the same scripts and they send just fine. On site and offsite using different Google domain names stopped sending, so its not tied to one specific Google apps domain. Nor is it tied to a specific network. All systems are running 18.10. Other things using this same account, send fine, through Ubuntu. PHP mailings for example.

It also does not matter what user I try to use within each Google domain. I can use SSMTP with a yahoo user and that sends from Ubuntu.

When I do ssmtp with -v on a linux box I see:

[<-] 220 smtp.gmail.com ESMTP b6sm3003334iok.71 - gsmtp
[->] EHLO munki.xxxxx.com
[<-] 250 SMTPUTF8
[->] STARTTLS
[<-] 220 2.0.0 Ready to start TLS
[->] EHLO munki.xxxxx.com
[<-] 
ssmtp:  (munki.xxxxx.com)

When I do the same on a pi I see:

[<-] 220 smtp.gmail.com ESMTP w23sm3846674iod.12 - gsmtp
[->] EHLO upsd-c03.xxxxx.com
[<-] 250 SMTPUTF8
[->] STARTTLS
[<-] 220 2.0.0 Ready to start TLS
[->] EHLO upsd-c03.xxxxx.com
[<-] 250 SMTPUTF8
[->] AUTH LOGIN
[<-] 334 Vjjl;hbWU6
[->] bmFnaW9zQG5XJzLm9yZw==
[<-] 334 UGFzc3dvcmQ6
[<-] 235 2.7.0 Accepted
[->] MAIL FROM:<[email protected]>
[<-] 250 2.1.0 OK w23sm38674iod.12 - gsmtp
[->] RCPT TO:<[email protected]>
[<-] 250 2.1.5 OK w23sm38674iod.12 - gsmtp
[->] DATA
[<-] 354  Go ahead w23sm3874iod.12 - gsmtp
[->] Received: by upsd-c03.xxxxx.com (sSMTP sendmail emulation); Fri, 14 Jun 2019 16:59:33 -0500
[->] From: "root" <[email protected]>
[->] Date: Fri, 14 Jun 2019 16:59:33 -0500
[->] test
[->] 
[->] .
[<-] 250 2.0.0 OK  1560549575 w23sm3846iod.12 - gsmtp
[->] QUIT
[<-] 221 2.0.0 closing connection w23sm3846iod.12 - gsmtp

Just wondering if anyone else using Google to send email with SSMTP has seen the same behavior? I haven't tested an 18.04 or 19.04.

Thank you!!

Jim

I have setup msmtp on Ubuntu 16.04 LTS to deliver system email messages (cron, etc) to my inbox using an external smtp server.

I use the packages msmtp-mta, ca-certificates, heirloom-mailx

The configuration works fine. However emails that the system sends out, do not get the correct "from" email address. Instead my smtp service provider's domain appears in the from email address.

When I send a mail on the console, all is fine (as configured in /etc/msmtprc).

How can I fix this and have my domain name in those cron messages (also unattended upgrades messages)

I isntalled successfull ssmtp:

/etc/ssmtp/ssmtp.conf

[email protected]
[email protected]
mailhub=ssl0.ovh.net:587
#mailhub=ns0.ovh.net:587
UseSTARTTLS=YES
FromLineOverride=YES
[email protected]
AuthPass=********

And trying it with:

 echo content | mail -s "subject" [email protected]

This works and I do receive email

my ssmpt seems also ok:

 ls -la /usr/sbin/sendmail
lrwxrwxrwx 1 root root 5 Jul 15  2014 /usr/sbin/sendmail -> ssmtp

my php.ini has:

sendmail_path = "/usr/sbin/sendmail -t -i"

However, when I try to send email through the mail() function: I receive FALSE

tail /var/log/apache2/error.log

gives me: sendmail: Cannot open mailhub:25

Any idea ?