Q: Can
email quotas be set automatically?
A: Quotas are not set
automatically; if you wish to set a quota on an individual user's email
account, you must do so through the vadduser or vedituser command.
Or for your convenience, a Web interface to both of these commands is
included in the Virtual
Administration Suite. You can add or edit users via the VAdmin Suite
Email Manager.
Q: How
can I prevent others from relaying Spam through my virtual server?
A: While receiving SPAM can be very
annoying, as a virtual server Administrator the problem is compounded when
spammers send their bulk email messages through your virtual server's SMTP
server. Such practice, known as Spam Relaying, makes it look as though you
are the culprit--when in fact, you are as much a victim as the spam
recipients themselves. To make matters worse, if other ISPs see a large
amount of spam coming from your virtual server, you may find yourself
blacklisted - even though you are innocent.
As anyone who has been a victim of spam relaying knows, it’s not a very
pleasant experience. If you leave your mail server unprotected, however, you
are a potential target for spam relayers.
PopAuth offers a way to protect your virtual server from being used as a
mail relay for bulk emailers. PopAuth is a new type of anti-relay protection
that is very functional and easy to use. We encourage all of our customers
to implement this feature on their virtual servers immediately.
Q: How
do I setup email for my virtually hosted clients with the same
usernames?
A: Your virtual server can have
more than one domain name associated with it. Using more than one domain
name on a virtual server is called Virtual Hosting.
Email accounts and email aliases can apply to any and all of the domain
names associated with your virtual server. For example, if the domains
123.com and abc.com both point to your virtual server, then an alias on your
virtual server called webmaster will work for mail sent to webmaster@123.com
and webmaster@abc.com.
However, what if you wanted webmaster@123.com to go to a different account
than webmaster@abc.com? The solution to this problem is called Virtual Email
mapping, or virtmaps.
Q: How
do I change a user's email/FTP password?
A: To change the password of one of
your users, Telnet to your virtual server and type the following at the
command prompt, where username is an actual username:
vpasswd username
You are prompted for a new password, which you must confirm by typing a
second time. For security purposes, the password will not display on the
screen.
Q: Can
email quotas be set automatically?
A: Quotas are not set
automatically; if you wish to set a quota on an individual user's email
account, you must do so through the vadduser or vedituser command.
For your convenience, a Web interface to both of these commands is included
in the Virtual
Administration Suite. You can add or edit users via the VAdmin Suite
Email Manager.
Q: I
get the following error: 'Mail loops back to me: MX error.'
A: This error often occurs when you
try sending mail to a user account on a virtually hosted domain.
If you are getting this error, you most likely do not have an entry for the
user's domain name in your ~/etc/sendmail.cw file.
Unless you add the domain name to this file, you will be unable to receive
email messages addressed with the domain name.
Q: How
do I change a user's email/FTP password?
A: To change the password of one of
your users, Telnet to your virtual server and type the following at the
command prompt, where username is an actual username:
vpasswd username
You are prompted for a new password, which you must confirm by typing a
second time. For security purposes, the password will not display on the
screen.
Q: How
do I disable email authentication warnings?
A: You may have wondered about a
mysterious message that appears in the extended email headers of mail sent
from your virtual server. This 'x-authentication-warning' message can easily
be disabled by changing one line of your ~/etc/sendmail.cf file.
If you have seen these messages and want to disable them, open your
~/etc/sendmail.cf file in the pico editor and comment out the following
line:
O PrivacyOptions=authwarnings
To comment out this line, simply add a pound sign (#) to the beginning of
the line, as follows:
#O PrivacyOptions=authwarnings
NOTE: Be very careful when editing this file. It is a very important
but very complex file that is easily corrupted. You should make a backup of
this file before editing it.
Q: How
do I setup email service for my virtual hosts?
A: Normally when you run the "vaddvhost"
command you do not have to do anything else, but to double check that email
service is set up read the below section.
NOTE: This section requires modification of your sendmail.cw file.
Because this is a very important and somewhat complex file, we recommend you
make a backup copy before making any changes.
To add email service for your virtual hosts, Telnet to your virtual server
and follow the steps below:
cd to your /etc directory by typing the following command at the prompt:
cd etc Enter
Open the sendmail.cw file in the pico editor.
Add your virtual hosts, one per line, into the sendmail.cw file as shown
below:
johndoe.com
janedoe.com
mycompany.com
The virtual host entries you add to the sendmail.cw file will now be able to
use email POP and SMTP.
Q: How
do I use autorespond / autoreply?
A: The Auto-Responder program is
already installed and configured in your /usr/bin/ directory.
To set up an Auto-Responder that sends an autoreply message, follow the
steps below:
Create an autoreply message (the message sent back to the customer) in your
home directory:
pico ~/.autoreply
Add something like the following to your "etc/aliases" file:
info: NAME@DOMAIN_NAME, "|/usr/bin/autoreply -f
info-reply -a info"
Your entry should appear on a single line within your Unix editor.
Run the vnewaliases command to update your etc/aliases.db file.
With the above example, when your customer sends you mail at "info@DOMAIN_NAME"
it will send back whatever message is contained in the ~/.autoreply file
(NOTE: You can use the "-m" option to specify a different message
file (i.e. "autoreply -m /etc/mymessage").
The "-f" option allows you to change who the autoreply message
will be from (in the example above, the "From:" field the customer
gets will read "info-reply@DOMAIN_NAME").
The "-a" option specifies the alias that the autoreply can reply
for; this should be the same as what is in front of the ":" in the
aliases file.
Note that in the above example, mail sent to "info@DOMAIN_NAME"
will also be sent to "NAME@DOMAIN_NAME." If "NAME@DOMAIN_NAME"
were left out, you would not receive a copy of the email from the customer.
Email
Questions Page 2