Sendmail hangs when trying to send mail.

Whenever I try to use sendmail to send email, the server hangs indefinitely and I am forced to restart the ssh session to be able to issue any commands. Even simply typing “sendmail” causes the server to hang.

I have taken the following steps to install send mail:

  1. sudo apt-get install sendmail

  2. I configured the hosts file at “nano /etc/hosts” by adding this as suggested by a another user in the help community: “ localhost localhost.localdomain pedrogarcez”. So my hosts file looks like this:

Your system has configured ‘manage_etc_hosts’ as True.

As a result, if you wish for changes to this file to persist

then you will need to either

a.) make changes to the master file in /etc/cloud/templates/hosts.tmpl

b.) change or remove the value of ‘manage_etc_hosts’ in

/etc/cloud/cloud.cfg or cloud-config from user-data pedrogarcez pedrogarcez localhost localhost localhost.localdomain pedrogarcez

The following lines are desirable for IPv6 capable hosts

::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts

  1. I ran the sendmail config using “sudo sendmailconfig” and answered ‘Y’ to everything.
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If sendmail is taking too long to send an email, try checking if port 25 is open on your Droplet. To do so, run the following command:

nc -vz 25

If it returns a failure, please open a support ticket and the team will help you out. Otherwise, look at sendmail’s logs (usually located at /var/log/mail.log) and see if there’s anything there that could help you find out what’s wrong.