topic Steps for smtp authentication for sendmail in Operating System - HP-UX

Steps for smtp authentication for sendmail

coollllllllllll — Tue, 07 May 2013 08:37:25 GMT

Hi ,

We have sendmail 8.11 in our setup

Our service provider is saying we need to enable smtp authentication in our setup.

When we are trying to send mails we are getting ;

xyz.chau@xx.in.... Connecting to [202.162234.222] via relay...

220 ESMTP ESMTP

>>> EHLO dccbsr01.xx.in

250-mail.xx.in

250-PIPELINING

250-SIZE 5242880

250-VRFY

250-ETRN

250-AUTH LOGIN PLAIN

250-AUTH=LOGIN PLAIN

250-ENHANCEDSTATUSCODES

250-8BITMIME

250 DSN

>>> MAIL From:tejachau@dccbsr01.xx.in SIZE=18 AUTH=tejachau@dccbsr01.xx.in

250 2.1.0 Ok

>>> RCPT To:xyz.chau@xx.in

554 5.7.1 <xyz.chau@xx.in>: Recipient address rejected: Access denied

>>> RSET

250 2.0.0 Ok

tejachau... Connecting to local...

tejachau... Sent

Closing connection to [202.162.234.222]

>>> QUIT

221 2.0.0 Bye

What is to be done now ??

Re: Steps for smtp authentication for sendmail

Matti_Kurkela — Tue, 07 May 2013 09:30:21 GMT

Your provider seems to allow two authentication methods: LOGIN and PLAIN.

Both methods send the password in plain-text, so anyone monitoring the network would get to know your email password, which would not be a good thing.

So the first step needed would be to enable SSL/TLS encryption to protect your authentication information. (If your service provider has set up things securely, trying to send the AUTH command without encryption would probably cause another error message, telling you that encryption is also required.)

To do that, you may need to update your sendmail version to 8.13.3 first:

https://h20392.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=SMAIL813

This document, titled "Sendmail 8.13.3 Secure Mailing Solution" includes HP-UX specific procedures for configuring Sendmail 8.13 for SSL/TLS and authentication.

http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c02037950/c02037950.pdf

In particular, you should pay attention to the chapter titled "Using Sendmail 8.13.3 with AUTH", starting from page 25.

You will probably need to install the SASL libraries listed in the previous chapter, but you might not need to configure your sendmail to _require_ authentication unless it is visible to the internet. But your service provider requires that your server must be able to _provide_ authentication information to their email gateway... and that's exactly what the "Using Sendmail 8.13.3 with AUTH" chapter describes.

Re: Steps for smtp authentication for sendmail

coollllllllllll — Mon, 27 May 2013 11:47:44 GMT

Hi Matti ,

We are using following sendmail version;

root #/ >swlist -l product|grep -i sendm
PHNE_35951 1.0 sendmail(1M) 8.11.1 patch

My mail service provider is saying we need to send mails using SMTP AUTH.

They use PLAIN method.

But m not able to find sendmail.mc here.

Should i generate it using /usr/newconfig/etc/mail/cf/cf/generic-hpux10.mc

Please advice.