Hexamail Nexus Administration Guide - Content - Links

Links

Link URL checks

Links

   Checks

Suspicious URLs
Suspicious URLs often indicate an email is spam. This may include very long numerical URLs, URLs containing an email address or URLs containing the word remove
Example interface

(More Info)Off, Weight, Mark, Block, Delete
Weight
Mismatched URLs
Mismatched or masked URLs often indicate an email is spam or a Phishing attack.
Example interface

(More Info)Off, Weight, Mark, Block, Delete
Mark
Internet Updated URLs
The action to take if an Internet updated disallowed url expression is found.
Example interface

(More Info)Off, Weight, Mark, Block, Delete
Block

   Expressions

URL Expressions
This list allows the configuration of url matching expressions. When an expression matches it will perform the action specified for the expression. The expression type shows the type of expression the matching engine will use for the entered expression. Expressions have a built in precedence: Allow > Delete > Block > Mark > Weight Remember that your SPAM Blocker/Action settings may globally preclude one or more of these actions.
Expression types:
Case insensitive substring
simply "match" or "sub(match)"
sub(mail) matches the phrase "Hexamail produces server software"
Case sensitive substring
"SUB(match)"
SUB(mail) does not match the phrase "HexaMail produces server software"
Case insensitive exact match
"cmp(match)"
cmp(mail) matches ONLY the entire exact string "mAil"
Case sensitive exact match
"CMP(match)"
CMP(mail) matches ONLY the entire exact string "mail"
Case insensitive word match
" match " or "word(match)"
word(mail) does not match the phrase "Hexamail produces server software" but does match the phrase "Hexamail produces mail server software"
Case sensitive word match
"WORD(match)"
WORD(Mail) does not match the phrase "Hexamail produces mail server software" but does match the phrase "Mail server software produced by Hexamail"
Case insensitive wild match
"*m?tch*" or "wild(*m?tch*)" (? - single character match, * - multiple character match)
Example wild(*v?agra*) matches the phrase "Hexamail does not ship v1agra"
the * wrappers round wildcard expressions, you can also do wild(Start*) to match the phrase "Start of the content" but not match "the content starts here"
Case sensitive wild match
"WILD(m?tch)"
WILD(*v?agra*) does not match the phrase "Hexamail does not ship V1agra"
the * wrappers round wildcard expressions, you can also do WILD(*End) to match the phrase "The content End" but not match "the content ends here"
Regular expression
"reg(expression)"
can be found at the website
http://www.regular-expressions.info/
Case sensitive regular expression
"REG(expression)"
can be found at the website
http://www.regular-expressions.info/
Boolean expression
"BOOL(expression)"
BOOL(wild(*viagra*) AND wild(*ph?rm?cy*) must match both wild matches to be considered an overall match. Brackets may be used.
Brackets allow nested clauses in a BOOL expression

Add #NN to any weighting expression to multiple the weight by the number NN

 - If matched these expressions allow the email
 - If matched these expressions add weight to the email score
 - If matched these expressions mark the email
 - If matched these expressions block the email
 - If matched these expressions delete the email
(Click the heading to sort by the column)
Expression
The expression
Action
Action the expression has
Type
Type of expression
(Underneath control)
Add an expression
Test a phrase against the expressions
Edit the selected expression
Delete the selected expression(s)
Import expressions from a file
Export the selected expressions to a file
(Right click selected items)
Edit the selected expression
Change the expression action
-->
Set the expression to Allow
Set the expression to Weight
Set the expression to Mark
Set the expression to Block
Set the expression to Delete
Enable the selected expression(s)
Disable the selected expression(s)
Delete the selected expression(s)

   DNS checking

Use DNS URL Blocking
DNS based URL blocking lists can be used to match URL hosts contained in spam and take an action if found. This helps to block very short emails only containing links or emails with large amounts of text used to prevent content blocking. For more information please refer to http://www.surbl.org/ and http://www.spamhaus.org/ If a list is matched vs a URL host found in the email it will perform the action specified for the list entry. Many lists simply return 127.0.0.2 indicating a match and this is taken as the default match. Some combined lists require a bitmask to determine which sublist was matched. In these cases you can specify the bitmask to match using the notation: e.g. combined.dnslist.com:4 which will match only if the returned result is 127.0.0.4 Please consult the implementation guide for the lists you have configured and also any usage policies. In many cases lists are free to use only for a limited number of users or email per day. If you exceed the usage limits your server may be blocked from using the list or you may be required to pay a small fee to continue to use the list.
Expression types:
Case insensitive substring
simply "match" or "sub(match)"
sub(mail) matches the phrase "Hexamail produces server software"
Case sensitive substring
"SUB(match)"
SUB(mail) does not match the phrase "HexaMail produces server software"
Case insensitive exact match
"cmp(match)"
cmp(mail) matches ONLY the entire exact string "mAil"
Case sensitive exact match
"CMP(match)"
CMP(mail) matches ONLY the entire exact string "mail"
Case insensitive word match
" match " or "word(match)"
word(mail) does not match the phrase "Hexamail produces server software" but does match the phrase "Hexamail produces mail server software"
Case sensitive word match
"WORD(match)"
WORD(Mail) does not match the phrase "Hexamail produces mail server software" but does match the phrase "Mail server software produced by Hexamail"
Case insensitive wild match
"*m?tch*" or "wild(*m?tch*)" (? - single character match, * - multiple character match)
Example wild(*v?agra*) matches the phrase "Hexamail does not ship v1agra"
the * wrappers round wildcard expressions, you can also do wild(Start*) to match the phrase "Start of the content" but not match "the content starts here"
Case sensitive wild match
"WILD(m?tch)"
WILD(*v?agra*) does not match the phrase "Hexamail does not ship V1agra"
the * wrappers round wildcard expressions, you can also do WILD(*End) to match the phrase "The content End" but not match "the content ends here"
Regular expression
"reg(expression)"
can be found at the website
http://www.regular-expressions.info/
Case sensitive regular expression
"REG(expression)"
can be found at the website
http://www.regular-expressions.info/
Boolean expression
"BOOL(expression)"
BOOL(wild(*viagra*) AND wild(*ph?rm?cy*) must match both wild matches to be considered an overall match. Brackets may be used.
Brackets allow nested clauses in a BOOL expression

Add #NN to any weighting expression to multiple the weight by the number NN

 - If matched these DNS list servers allow the email
 - If matched these DNS list servers add weight to the email score
 - If matched these DNS list servers mark the email
 - If matched these DNS list servers block the email
 - If matched these DNS list servers delete the email
(Click the heading to sort by the column)
List Server
The DNS list server
Action
Action of the DNS list server
Status
Status of the DNS list server
(Underneath control)
Add DNS list server
Edit the selected DNS list server
Delete the selected DNS list server(s)
(Right click selected items)
Edit the selected DNS list server
Change the DNS list server action
-->
Set the DNS list server to Allow
Set the DNS list server to Weight
Set the DNS list server to Mark
Set the DNS list server to Block
Set the DNS list server to Delete
Enable the selected DNS list server(s)
Disable the selected DNS list server(s)
Delete the selected DNS list server(s)


Link to this page
Hexamail http://www.hexamail.com/
This content last built on Mon, 21 Sep 2020