timdoug's interesting tidbits

Little bits of technical documentation and such. Hopefully helpful.

2013-01-21

How to send email through Gmail / Google Apps Email with the Amazon Linux AMI on EC2

First, install the Heirloom mailx client with yum install mailx. The NSS certificates included with the AMI are either out of date or incomplete, so you've got to grab the Equifax root cert and set it up yourself, like this:

wget https://www.geotrust.com/resources/root_certificates/certificates/Equifax_Secure_Certificate_Authority.cer
certutil -d ~/.mailcerts/ -A -t TC -n "Equifax Secure Certificate Authority" -i Equifax_Secure_Certificate_Authority.cer
Then set up your ~/.mailrc like this:
set smtp-use-starttls
set smtp=smtp://smtp.gmail.com:587
set smtp-auth=login
set smtp-auth-user="your_username@example.com"
set smtp-auth-password="your_password"
set from="your_username@example.com"
set nss-config-dir="~/.mailcerts"
set ssl-verify=warn
That last "ssl-verify=warn" line looks pretty dangerous, and it definitely could be. I needed it because otherwise mailx would bark with Comparing DNS name: "smtp.gmail.com" Continue (y/n)? and...giving up, instead of accepting any input. For whatever reason my Debian box works fine without this line. Also, one could use this line without setting up the root certificate appropriately, but that's playing a bit too fast and loose for me.

With this configuration you should be good to go with: echo "body here" | mailx -s "Subject here" recipient@example.com

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