I am using a linux based device where we use nullmailer to send email using smtp.
nullmailer version: 1.0.5 User-Agent: Mutt/1.5.19 (2009-01-05)
In the existing mechanism, our smtp server does not have any authentication.It is just a plain text. Now we need a secure authentication for smtp.
By googling I found some work around for this,the suggestions are to change the values in
/etc/nullmailer/remotes. I have changed as per the suggestions and tried to run
nullmailer-send but no luck.
Here is the list of changes I have made in
1. smtp.gmail.com smtp --user=[GMAIL_USERNAME@gmail.com] --pass=[GMAIL_PASSWORD] 2. smtp.gmail.com smtp --auth-login --user=[GMAIL_USERNAME@gmail.com] --pass=[GMAIL_PASSWORD] 3. smtp.gmail.com smtp --port=25 --user=[GMAIL_USERNAME@gmail.com] --pass=[GMAIL_PASSWORD] 4. smtp.gmail.com smtp --port=587 --starttls --user=[GMAIL_USERNAME@gmail.com] --pass=[GMAIL_PASSWORD] 5. smtp.gmail.com smtp --port=465 --auth-login --user=[GMAIL_USERNAME@gmail.com] --pass=[GMAIL_PASSWORD] --ssl
None of them are working.
Again I found that the version of nullmailer(1.0.5) may not support any secure authentication (ssl/tls/starttls). I validated this concept by
See this reference :
-p, --port=INT Set the port number on the remote host to connect to --user=VALUE Set the user name for authentication --pass=VALUE Set the password for authentication --auth-login Use AUTH LOGIN instead of AUTH PLAIN in SMTP
[You can see there is no options for ssl/tls/starttls]
So, I updated the version of nullmailer from
1.0.5 to 1.11 But when I execute
nullmailer-send to send the queued messages in
/var/nullmailer/queue but met with below error
Could not load the config
Making the story short, here is the list of my concern :
1. Can I secure the smtp channel using the existing version of nullmailer. 2. Is nullmailer 1.0.5 does not supprt any secured authentication. (ssl/tls/starttls) 3. If it does how can I set the security what should be the /etc/nullmailer/remotes value. 4. If I update the version from 1.0.5 to 1.11 what are the dependencies.
I went through almost all the links provided by google, but still in a big puzzle.
Help would be highly appreciate. I may missed something important.
Please ask anything if this issue is not clear to anyone.