Shell Programming and Scripting

Here is what i did.

Please suggest if i missed anything; still no luck though .

Step1:

Code:

[root@development_techx ~]#  makemap hash /etc/mail/default-auth-info</etc/mail/default-auth-info
[root@development_techx ~]# more /etc/mail/default-auth-info
AuthInfo:smtp.zoho.com "U:mohtashim@techx.com" "P:mypassword" "M:PLAIN"

Step2:
Enabled the below in /etc/mail/sendmail.cf

Code:

# default authentication information for outgoing connections
O DefaultAuthInfo=/etc/mail/default-auth-info

Step 3:
Restart sendmail service.

Below is the configuration from the sendmail.cf file.

Code:

[root@development_digiklug ~]# grep -i authinfo /etc/mail/sendmail.cf
O DefaultAuthInfo=/etc/mail/default-auth-info
###  authinfo: lookup authinfo in the access map
Sauthinfo
R$*             $: $1 $| $>D <$&{server_name}> <?> <! AuthInfo> <>
R$* $| <?>$*    $: $1 $| $>A <$&{server_addr}> <?> <! AuthInfo> <>
R$* $| <?>$*    $: $1 $| <$(access AuthInfo: $: ? $)> <>
R$* $| <?>$*    $@ no                           no authinfo available

Can you tell me if the above looks good ?

However it still fails with the same error as in my previous post.

@drysdalk: A better bet here is to find another host on your network that can actualy be configured to act as a genuine smart relay for your domain, and to just set Sendmail up to use that host as its smart relay rather than this external service.

Can you suggest any freeware and how to configure/install it so that we don't end up in a similar situation ?

---------- Post updated at 09:20 AM ---------- Previous update was at 03:51 AM ----------

UPDATE: One of the Admin had installed a software called as Jira on the same system and JIRA is able to send out emails to our email ID from info@dev.techx.com to mohtashim@techx.com.

I dont know how does it do that nor can i figure it out.

Anyways it will be great if i could find a solution to sending emails to mohtashim@techx.com from this server.

Hi,

Now that you've fixed your host file problem, you might not actually need the smart relay. What happens if you take it out (just going back to the blank DS line), but keep the hosts file changes you made ?

It still does not work. I will update the maillog in a few hrs.

Here is what I think.

1. I think we need to enable TLS in sendmail for zoho to work. Not sure how to do that if someone can help.

2. Would appreciate some document web resource that helps easily setup smart relay on Linux centos 7as an alternate incase zoho does not work.

3. Below is the configuration that helps softwares on my server to send out emails using the same zoho.

Code:

production: email_delivery: 
delivery_method: :smtp 
  smtp_settings: 
    address: smtp.zoho.com
    enable_starttls_auto: true
    port: 587
    domain: tech.com
    authentication: :login 
    user_name: mohtashim@techx.com
    password: redmine

Hi,

OK, thanks - it would be interesting to know exactly why this didn't work, and what precisely caused the mail delivery to fail, which we'll hopefully get clues about from your mail logs.

One thing I'm not 100% clear on is why you actually need a smart relay here. Ultimately, barring there being networking restrictions in place that prevent your host communicating over SMTP with the outside world, there's nothing a dedicated smart relay box can do that your own local Sendmail install can't. Unless as I say something is configured on your network to stop your own dev box sending mail to the Internet, then it shoud be perfectly capable of delivering e-mail via SMTP to any host without needing a relay.

Of course, other hosts may well still reject that mail for a variety of reasons (e.g. they think it resembles spam, your IP/network range has a poor reputation, your reverse DNS doesn't match your forward DNS, you've gotten yourself listed on an RBL like Spamhaus, etc, etc). So if that's the reason you need a smart host - your own dev box is being rejected by other Internet hosts - then you'd need a smart host on your network that had none of the problems of your dev box, which might actually be hard to do.

Do you have a corporate SMTP gateway or mail server that deals with the normal incoming and outgoing e-mail for your whole site ? If so, can you maybe configure your smart relay to be that host instead. I imagine that somewhere locally you already have a host that handles routine e-mail functionality, and it might well be capable of acting as a smart relay in that case (though it will probably need to be configured to allow the IP of your dev box to relay through it).

In my previous post i strongly believe that it is the missing TLS entries in the sendmail.mc or .cf that is causing the send mail not to work. The reason behind this conclusion is that SMTP email service for zoho is working on my same server with the below details.

Code:

production: email_delivery: 
delivery_method: :smtp 
  smtp_settings: 
    address: smtp.zoho.com
    enable_starttls_auto: true
    port: 587
    domain: tech.com
    authentication: :login 
    user_name: mohtashim@techx.com
    password: redmine

Removing the TLS entry enable_starttls_auto: true from SMTP fails the email service from working. However, i need help directions in enabling TLS on sendmail.

I was able to fix the relay host not being generated in the sendmail.cf file by fixing the syntax issue in the sendmail.mc file.

Please find the logs after the hosts file was fixed below with DSsmtp.zoho.com entry in the sendmail.cf & Mail NOT working below.

Attaching the sendmail.mc here.

Please suggest.

Hi,

Sorry for the delay in replying - glad you've gotten your Sendmail config generating correctly now at least. I'm afraid I can't really help you much further though, sorry. I've got no experience myself in setting up Sendmail to do what you're trying to do, as I've never had to set up a Sendmail box to do quite what you're trying to do.

From some Googling it seems it's certainly possible to get Sendmail to talk to an MSA rather than an MTA and authenticate against it using the authinfo mechanism previously discussed, but as you say you might need to get TLS and other things besides working for this to operate correctly. Perhaps others who have gone down this road and are reading this thread could advise you on how to proceed, if this is really something you absolutely have to do.

On that subject, though: again, is there a reason you have to do this, and pass the mail on to a server that is normally used for talking to mail clients and whatnot ? Why can't you just straight send this mail to its correct destination from your local server, without a relay or smart host or anything else in the way ? Or alternatively, is there not a mail server on site that already is set up to do e-mail correctly that you can just use as your smart relay, saving yourself all this trouble ?

Our domain is techx.com however does not have any smtp service like smtp.techx.com. Infact techx.com domain is actually provided by same zoho.com.

I m not sure how to setup using this approach. Any guide / link with step by step approach for Linux centos 7 in this regards would be appreciated. All i need is the outgoing emails from my linux server to work.