Gmail -java error

Add-ons Bindings
1

What does this error code mean:

aused by: java.net.UnknownHostException: smtp.gmail.com
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184) ~[na:1.8.0]
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0]
        at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0]
        at java.net.Socket.connect(Socket.java:538) ~[na:1.8.0]
        at java.net.Socket.<init>(Socket.java:434) ~[na:1.8.0]
        at java.net.Socket.<init>(Socket.java:286) ~[na:1.8.0]
        at org.apache.geronimo.javamail.transport.smtp.SMTPTransport.getConnectedSocket(SMTPTransport.java:1096) ~[na:na]
        at org.apache.geronimo.javamail.transport.smtp.SMTPTransport.getConnection(SMTPTransport.java:856) ~[na:na]
        at org.apache.geronimo.javamail.transport.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:385) ~[na:na]
        ... 36 common frames omitted

i copied the mail. binding into addons and used this setting in the config file

######################## Mail Action configuration ####################################
#
# The SMTP server hostname, e.g. "smtp.gmail.com"
mail:hostname=smtp.gmail.com

# the SMTP port to use (optional, defaults to 25 (resp. 587 for TLS))
mail:port=587

# the username and password if the SMTP server requires authentication
mail:username=xxxxxx
mail:password=xxxxxx

# The email address to use for sending mails
mail:from=xxxxx@gmail.com

# set to "true", if TLS should be used for the connection
# (optional, defaults to false)
mail:tls=true

# set to "true", if POP before SMTP (another authentication mechanism)
# should be enabled. Username and Password are taken from the above
# configuration (optional, default to false)
#mail:popbeforesmtp=
2

“Thrown to indicate that the IP address of a host could not be determined.”

Is there any possibility that you have some whitespace (space, tabs, etc.) at the end of the configuration line?

3

Double checked, but there were no whitespaces there

I will try on another rpi now

4

You can use “nslookup smtp.google.com” on the RPi to verify that the host can resolve the name. When I run it from the Pi I see…

Non-authoritative answer:
smtp.gmail.com	canonical name = gmail-smtp-msa.l.google.com.
Name:	gmail-smtp-msa.l.google.com
Address: 74.125.22.108
Name:	gmail-smtp-msa.l.google.com
Address: 74.125.22.109

If the name can’t be resolved from your host, you see something like…

** server can't find smtp.gmail.com: NXDOMAIN
5

on to it, however now i get this error…

pi@raspberrypi ~ $ sudo apt-get install dnsutils
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  rblcheck
The following NEW packages will be installed:
  dnsutils
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 162 kB of archives.
After this operation, 309 kB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
  dnsutils
Install these packages without verification [y/N]? y
Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main dnsutils armhf 1:9.8.4.dfsg.P1-6+nmu2+deb7u7
  Something wicked happened resolving 'mirrordirector.raspbian.org:http' (-5 - No address associated with hostname)
Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/b/bind9/dnsutils_9.8.4.dfsg.P1-6+nmu2+deb7u7_armhf.deb  Something wicked happened resolving 'mirrordirector.raspbian.org:http' (-5 - No address associated with hostname)
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
pi@raspberrypi ~ $ nslookup smtp.google.com
-bash: nslookup: command not found

maybe i have to reinstall rasbian.

6

Hi Kim,
I would say this seems to be a DNS problem. Can you “ping smtp.gmail.com”?
You should verify your network settings regarding IP and DNS.

Regards,
Michael

7 
 ping smtp.gmail.com
PING gmail-smtp-msa.l.google.com (64.233.162.108) 56(84) bytes of data.
64 bytes from li-in-f108.1e100.net (64.233.162.108): icmp_req=1 ttl=45 time=35.9                              ms
64 bytes from li-in-f108.1e100.net (64.233.162.108): icmp_req=2 ttl=45 time=45.0                              ms
64 bytes from li-in-f108.1e100.net (64.233.162.108): icmp_req=3 ttl=45 time=41.0                              ms
64 bytes from li-in-f108.1e100.net (64.233.162.108): icmp_req=4 ttl=45 time=39.9                              ms
64 bytes from li-in-f108.1e100.net (64.233.162.108): icmp_req=5 ttl=45 time=49.9                              ms
64 bytes from li-in-f108.1e100.net (64.233.162.108): icmp_req=6 ttl=45 time=43.6                              ms
64 bytes from li-in-f108.1e100.net (64.233.162.108): icmp_req=7 ttl=45 time=49.8                              ms
64 bytes from li-in-f108.1e100.net (64.233.162.108): icmp_req=8 ttl=45 time=48.5 ms
64 bytes from li-in-f108.1e100.net (64.233.162.108): icmp_req=9 ttl=45 time=43.3 ms
64 bytes from li-in-f108.1e100.net (64.233.162.108): icmp_req=10 ttl=45 time=243 ms
64 bytes from li-in-f108.1e100.net (64.233.162.108): icmp_req=11 ttl=45 time=67.8 ms
64 bytes from li-in-f108.1e100.net (64.233.162.108): icmp_req=12 ttl=45 time=42.1 ms
64 bytes from li-in-f108.1e100.net (64.233.162.108): icmp_req=13 ttl=45 time=36.1 ms

seems to work…