Invalid login - 504 5.3.3 AUTH mechanism PLAIN not available

In my Meteor app, I have enabled Accounts.config({sendVerificationEmail: true}) so that a verification email is sent post registration.

As soon as I create a new user, I get the following exception on server side console.

I20150527-23:48:08.157(-7)? - - - - - I20150527-23:48:08.155(-7)? at smtpSend (packages/email/email.js:76:1)

I20150527-23:48:08.154(-7)? Exception while invoking method ‘createUser’ AuthError: Invalid login - 504 5.3.3 AUTH mechanism PLAIN not available

I went back and checked the details of AUTH supported.

[mtikmani@host1]$ telnet localhost smtp Trying… Connected to localhost. Escape character is ‘^]’. 220 host1 ESMTP Sendmail 8.14.4/8.14.4; Thu, 28 May 2015 06:50:47 GMT ehlo 250- Hello localhost.localdomain [], pleased to meet you 250-ENHANCEDSTATUSCODES 250-PIPELINING 250-8BITMIME 250-SIZE 250-DSN 250-ETRN 250-AUTH GSSAPI DIGEST-MD5 CRAM-MD5

Looks like on my host AUTH PLAIN is not supported and thus the exception. I can’t possibly add the AUTH PLAIN as this is maintained by IT guys, and they won’t be willing to change it to support AUTH PLAIN.

Q: a. Is there a way out?

b. Can’t I directly use ‘/usr/sbin/sendmail’ which is propertly configured by IT guys and can be used to send email?