Gmail is awesome. But I do not want Gmail to be the only location where all my important emails are stored. For this reason I use
fetchmail to automatically archive any emails sent to my Gmail account on my own FreeBSD server. This guide describes how I currently have this set up.
- FreeBSD 8.2
- Fetchmail 6.3.20
Installing Required Packages
If you haven’t already, install the
fetchmail port with the following commands.
$ cd /usr/ports/mail/fetchmail $ make install clean
We also need to install the
ca_root_nss port. This port contains all root certificates from certificate authorities included in Mozilla applications (i.e. Firefox and Thunderbird).
$ cd /usr/ports/security/ca_root_nss $ make install clean
First, make sure that you have POP access to your Gmail account enabled. This can be done from the Gmail settings page, under the tab ‘Forwarding and POP/IMAP’.
Next, calculate the MD5 fingerprint for the pop.gmail.com certificate. Whenever Google makes a change to the certificate this fingerprint has to be recalculated and updated in the fetchmail configuration.
$ echo -n | openssl s_client -connect pop.gmail.com:995 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' | openssl x509 -noout -fingerprint -md5 | cut -d '=' -f 2
Customize the following snippet and place it in
poll pop.gmail.com protocol pop3 with interval 3: user "<your Gmail address>" pass "<your Gmail password>" options keep ssl sslfingerprint "<actual MD5 fingerprint>" mda "/usr/bin/procmail -d %T"
That should be all, now we can test our configuration.
$ fetchmail -d0 -v pop.gmail.com
If everything is set up correctly then the output should look something like this:
fetchmail: 6.3.20 querying pop.gmail.com (protocol POP3) at Sun Oct 16 19:25:01 2011: poll started Trying to connect to 18.104.22.168/995...connected. fetchmail: Server certificate: ... fetchmail: POP3> QUIT fetchmail: POP3< +OK Farewell. fetchmail: 6.3.20 querying pop.gmail.com (protocol POP3) at Sun Oct 16 19:25:02 2011: poll completed