DNS based lists

Options for matching email using DNS based lists of sender domains

Sender domain (RHS)

DNS Domain lists

DNS based domain blocking lists can be used to match email sender domains and take an action if found. This helps to block email from known spam senders. 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:

sub

Case insensitive substring

Specify as

simply "match" or "sub(match)"

Example

sub(mail) matches the phrase "Hexamail produces server software"

SUB

Case sensitive substring

Specify as

"SUB(match)"

Example

SUB(mail) does not match the phrase "HexaMail produces server software"

cmp

Case insensitive exact match

Specify as

"cmp(match)"

Example

cmp(mail) matches ONLY the entire exact string "mAil"

CMP

Case sensitive exact match

Specify as

"CMP(match)"

Example

CMP(mail) matches ONLY the entire exact string "mail"

word

Case insensitive word match

Specify as

" match " or "word(match)"

Example

word(mail) does not match the phrase "Hexamail produces server software" but does match the phrase "Hexamail produces mail server software"

WORD

Case sensitive word match

Specify as

"WORD(match)"

Example

WORD(Mail) does not match the phrase "Hexamail produces mail server software" but does match the phrase "Mail server software produced by Hexamail"

wild

Case insensitive wild match

Specify as

"*m?tch*" or "wild(*m?tch*)" (? - single character match, * - multiple character match)

Example

Example wild(*v?agra*) matches the phrase "Hexamail does not ship v1agra"

Note

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"

WILD

Case sensitive wild match

Specify as

"WILD(m?tch)"

Example

WILD(*v?agra*) does not match the phrase "Hexamail does not ship V1agra"

Note

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"

reg

Regular expression

Specify as

"reg(expression)"

Example

can be found at the website
http://www.regular-expressions.info/

REG

Case sensitive regular expression

Specify as

"REG(expression)"

Example

can be found at the website
http://www.regular-expressions.info/

BOOL

Boolean expression

Specify as

"BOOL(expression)"

Example

BOOL(wild(*viagra*) AND wild(*ph?rm?cy*) must match both wild matches to be considered an overall match. Brackets may be used.

Note

Brackets allow nested clauses in a BOOL expression

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

Icon key:

- If matched these RHS list servers allow the email

- If matched these RHS list servers add weight to the email score

- If matched these RHS list servers mark the email

- If matched these RHS list servers block the email

- If matched these RHS list servers reject the email

Column Headings:(Click the heading to sort by the column)

List Server

The RHS list server

Action

Action of the RHS list server

Status

Status of the RHS list server

Buttons:(Underneath control)

Add

Add RHS list server

Edit

Edit the selected RHS list server

Delete

Delete the selected RHS list server(s)

Context Menu:(Right click selected items)