IMail v12 Administrator Help
Example:
You can have an automated response that lists products, prices, and ordering information; another automated response that describes the classes you offer the general public; and a third automated response that sends out company news.
To divide the Auto Responder account into more specialized responses, you create sub-areas of account (such as Sales, Classes, or News) from which the sender can obtain more specific information. Then, when someone sends mail to the [email protected] account, IMail Server returns a prepared response that describes the Auto Responder account sub-areas such as:
"Thank you for contacting Ipswitch. For information about our products, please send email to
[email protected]. For information about our classes, send mail to
[email protected]. For the latest Ipswitch news, send email to
[email protected]."
The sender could then send a message to [email protected] and receive a special message related to sales or the sender could send a message to [email protected] and receive a message about classes.
There is no limit to the number of sub-areas you can use with the Auto Responder. Sub-areas take up no disk space since messages addressed to them merely activate an automated response. In other words, mail addressed to sub-areas is not stored anywhere, unless you specify that it be saved.
Related Topics
Creating an Auto Responder Account (on page 181)
Creating Auto Responses to Sub-Mailboxes (on page 182)
Viewing Auto Responder Message Recipients (on page 183)
Auto Responder Variables (on page 183)
Sending Mail to All Users Using Mailall.exe (on page 165)
Add / Edit Auto Responder Account
How to get here
Before you define the automated response on the Auto Responder page, you need to first create an Auto Responder account.
To create an Auto Responder account:
1 Select a domain (on page 129) and user to associate the Auto Responder settings with.
2 On the User Auto Responder page, click Add or click link to Edit.
3 In the Mailbox text box, enter a mailbox (inbox, sent, or joe).
4 Check Enable Auto Responder.
181
IMail v12 Administrator Help
5 In the Forwarding Address text box, enter the e-mail address you want e-mail inquiries forwarded to after the automatic response is sent. Leave blank if forwarding is not required, this will leave all requests in the associated mailboxes.
Should you want the message to be deleted without any forwarding. Enter as follows:
"[email protected].
Important: Virtual e-mail domains without IP addresses must enter the full address, as it will authenticate against the primary domain with the full domain address.
6 In the Auto Response Message box, enter the response message to send to mail addressed to this account. The first 80 characters entered in the Message box are used as the subject of the message, and are displayed in the subject field.
7 When mail is sent to an Auto Responder account, the sender’s mail address is listed in a file with the extension .snt in the user's File Directory. To view this file, click the
Recipients List link next to the Enable Auto Responder check box. of the user's account. If you want to set up the same Auto Responder information for multiple accounts, copy the .inf file from one account directory to the directories of other accounts.
Related Topic
Creating Responses for Sub-Mailboxes (on page 182)
Auto Responder Variables (on page 183)
Viewing Auto Responder Message Recipients (on page 183)
Add Auto Responder Sub-Mailbox Responses
How to get here
After creating an Auto Responder account, sub-mailbox folders can be created to define different automated responses as described in the automated response from the "main" response.
To create responses using sub-mailboxes:
1 Select the user to associate the sub-mailboxes with in Auto Responder.
2 On the User Auto Responder page, click Add.
3 In the Sub- area text box, enter a folder name ( e.g. prod1
).
Note: Enter only the sub-mailbox name, the sub-mail box will not work if the userid-submailbox ( e.g. "info-prod1") is used.
4 Click Enable Auto Responder. This will enable access to the other text boxes.
182
IMail v12 Administrator Help
In the Forwarding Address text box, enter the e-mail address you want e-mail inquiries forwarded to after the automatic response is sent. Leave blank if forwarding is not required, this will leave all requests in the associated mailboxes. Should you want the message to be deleted without any forwarding. Enter as follows:
"[email protected].
Important: Virtual e-mail domains without IP addresses must enter the full address, as it will authenticate against the primary domain with the full domain address.
5 In the Auto Response Message box, enter the appropriate response message for the sub-mailbox on this account. The first 80 characters entered in the Message box are used as the subject of the message, and are displayed in the subject field.
6 When mail is sent to an Auto Responder account, the sender’s mail address is listed in a file with the extension .snt in the user's File Directory. To view this file, click the
Recipients List link next to the Enable Auto Responder check box. the user's account. If you want to set up the same Auto Response information for multiple accounts, copy the .inf file from one account directory to the directories of other accounts.
Viewing Auto Responder Message Recipients
How to get here
Use the Auto Responder Message Recipients page to view all the e-mail addresses that have been sent an automated response message.
The Auto Responder message is sent to each e-mail address that the recipient receives mail from. IMail Server saves the message sender's e-mail address in a file with the
".snt" extension in the account’s directory. This file provides the user with a list of users that received the automated response message.
Auto Responder Variables
The Auto-response message can include parts of the sender's message.
Note: Variables in the subject of your auto-response message cannot be substituted. The first line of the auto-response text is also the subject of auto-response message.
Variables are as follows:
%s "Subject" of the infobot file (first line)
%t Include "To:" from the header of the sender's message
183
IMail v12 Administrator Help
%m
%h
%b
Include sender's message
Include header of the sender's message
Include body of the sender's message
Note: If delivery rules are used to filter the body of messages, with usage of %m or %b in the auto-response message could create a mail loop.
DomainKeys / DKIM
How to get here
Domain Signing Options (Selectors) (on page 185)
DomainKeys/DKIM Verification Settings (on page 193)
Add Selector Wizard (on page 200)
DomainKeys and DomainKeys Identified Mail (DKIM) are e-mail authentication methodologies designed to verify digitally signed e-mail on a per-domain basis. Both methods were designed for protection of e-mail identity and have assisted in the control of
"spam" and "phishing". DomainKeys and DKIM use asymmetric key cryptography to sign messages with a private key and use DNS to distribute the public key for signature verification.
DomainKeys (RFC4870 (http://tools.ietf.org/html/rfc4870)) is a precursor to DKIM (RFC4871
(http://tools.ietf.org/html/rfc4871)), though both are currently in use, DomainKeys is considered deprecated by DKIM.
See the following PDF for help in Getting Started with DomainKeys / DKIM.
DomainKeys
DomainKeys is a domain-level e-mail authentication standard that uses public/private key encryption and DNS to prove the legitimacy and contents of an e-mail message, and also verifies that the domain used in the "from" or "sender" header of a message has not been modified while in transit.
Public Key / Private Key
A public key/private key-pair is created for the sending domain. The private key is stored securely on the mail server and is used to sign all outgoing messages. The public key is stored and published in DNS as a TXT record of the domain.
When an e-mail is sent, the mail server will use the private key to digitally sign it, which is part of the message header. When the e-mail message is received, the DomainKeys signature can be verified against the public key on the domain's DNS.
184
IMail v12 Administrator Help
For detail specifications on DomainKeys see RFC4870 (http://tools.ietf.org/html/rfc4870).
DKIM
DKIM is very similar in functionality to DomainKeys, with an enhanced standard that provides more flexibility and security. Although DKIM does not filter or identify spam, widespread use of DKIM can prevent spammers from forging the source address of their messages. If spammers are forced to show a correct source domain, then the other spam filtering techniques will work more effectively.
Some of the improvements provided by DKIM are as follows:
Multiple hashing algorithms (as opposed to just one available with DomainKeys).
Capability for one DNS text record to handle multiple domains.
Improved option for canonicalization that validates header and body separately.
Capability to delegate signing to third parties.
Capability to self-sign additional headers.
More advanced options for customization using DKIM. (e.g. Hash Algorithms, Body
Settings, Expiration)
For detail specifications on DKIM see RFC4871 (http://tools.ietf.org/html/rfc4871).
Related Topics
System Signing Options (Selectors) (on page 86)
Domain Selector List (Signatures)
How to get here
Selectors allow a domain to have one DomainKeys selector and one DKIM selector enabled at one time. Multiple selectors are allowed in a domain to give the IMail Administrator capability to easily change from one public-key in DNS to another.
Important: Only one DomainKey selector and one DKIM selector can be enabled at one
time for a domain. Example: A DKIM selector "selector1" is enabled for domain1.com. The
IMail Administrator decides to enable "selector2" for domain1.com. "selector1" will automatically be disabled for domain1.com.
Important: After updating or creating a selector be sure to restart your SMTP and Queue
Manager services.
185
IMail v12 Administrator Help
Domain Signatures (Selector)
Search Box. Typing will automatically begin narrowing the list. The search assumes a wildcard automatically after the characters entered.
Note: Column Titles when clicked will sort the list for the current session only. Refreshing the page will reset the original sort.
Default Selector. Hyperlink that allows the IMail Administrator to designate the default selector to be used for signing, should there be one selector set on a domain.
Note: Only one DomainKeys selector and one DKIM selector can be set as default at one time.
Selector List
Name. Name used to identify selector.
DNS Text Record. Name used to identify the selector in DNS. This text name allows any text string that is a legal DNS domain name.
Example: DNS Text Record set to MyDNSName will be named
"MyDNSName_domainkey.domainname.com"
Status. Selector status indicating active and on, or off.
Type. E-mail authentication type to verify the DNS domain of an E-mail sender and the message integrity.
DomainKeys. DomainKeys uses the Message Algorithm as the specified canonicalization method.
DKIM. (DomainKeys Identified Mail) is an enhanced protocol of DomainKeys, using public-key cryptography and key server technology to verify the source and contents of e-mail. DKIM uses the Header and Body Algorithm as the specified canonicalization method.
Enabled. Displays the selectors that are active for the selected domain. Click to
"activate / de-activate" the selector domain status.
Note: Only one DomainKey and one DKIM selector can be enabled per domain.
Add New (on page 187). Click to add a new selector. This will give the following two options
Wizard. Run this option for Administrators that are new to DomainKeys.
Advanced (on page 187). Click this option for Administrators that are familiar with all
DomainKey options.
Add Existing (on page 192). Click to add a System Selector to the domain.
186
IMail v12 Administrator Help
Remove. Click this after selecting item(s) from the list to remove from the Domain Selector
List.
Note: This will not delete from the System Selector List.
Related Topics
System Signing Options (Selectors) (on page 86)
Domain Selector Add / Edit (on page 187)
Domain Selector Add / Edit
How to get here
Important: After updating or creating a selector be sure to restart your SMTP and Queue
Manager services.
Selector Signing Properties
Type.
DomainKeys. Uses Message Algorithm for Preparation Signing.
DKIM. Uses Header and Body Algorithm for Preparation Signing.
Name. Value used to identify the selector in the IMail Administrator.
DNS Text Record. Name that will associate the selector in DNS. This text name allows any text string that is a legal DNS domain name.
Example: DNS Text Record set to MyDNSName will be named
"MyDNSName_domainkey.domainname.com"
Status. (On by default) Click "Off" to disable the selector.
Description. Free format text box limited to 1024 characters.
Header Algorithm (DKIM only). DKIM uses both the Header and Body Algorithm as the specified canonicalization method.
Simple. This algorithm is designed to be the least tolerant. Each header is unfolded per RFC2822 and is converted to lowercase.
Relaxed. (Set by default) This algorithm tolerates common modifications such as white-space replacement and header line re-wrapping.
Body Algorithm (DKIM only).
Simple. This algorithm is designed to be the least tolerant.
Relaxed. (Set by default) This algorithm tolerates common modifications such as white-space replacement and header line re-wrapping.
187
IMail v12 Administrator Help
Message Algorithm (DomainKeys only). DomainKeys uses the Message Algorithm as the specified canonicalization method.
Simple. Allows toleration of almost no modification.
No Folding Whitespace (nofws). (Set by Default) Allows common modifications such as white-space replacement and header line re-wrapping.
Public Key. The public key which is automatically generated is what must be stored and published in DNS as a TXT record of the associated domain.
Tip: Remember to check for the "p=" in front of the key
Advanced Properties
DomainKeys and DKIM Option
Private Key. Text box displaying text string of Private Key. The private key is stored securely on the mail server and is used to sign all outgoing messages.
Generate New Key. (Default is 1024 Kb) Clicking this button will generate a new
Private Key, with a pop-up option for the private key length (512, 768, 1024, 1536,
2048).
DKIM Advanced Options Only
Hash Algorithm. SHA (Secure Hash Algorithm) hash functions are a set of cryptographic hash functions designed by the NSA and published by the NIST as a US Federal Information
Processing Standard.
SHA-256. (Set by default) Is an improved hash function in the SHA-2 family, computed with 32-bit words.
SHA-1. The best established of the existing SHA hash functions, and is employed in several widely used security applications and protocols.
Body Settings. Options for body length limits when signing.
Sign Entire Body. (Set by default)
Sign Entire Body and Include Length Tag. Including the length tag allows message trailers to be better tolerated after the message is sent.
Specify Max Body Length for Signing. Textbox for max amount of bytes to sign.
Expiration. When both the Timestamp and Expiration Tag are set, then a validation check will be done to verify that the Expiration Tag is greater than the Timestamp when the signature is verified.
Include Timestamp. (Set by Default) This tag tells the verifying server when the signature was generated.
Include Expiration Tag. (Optional) When used, this tag tells the verifying server to ignore this signature after the time specified.
188
