Here is a list of merge tags from well knows Email Service Providers that we have collected:
ACT-ON
{{E-mail Address}}
ACTIVECAMPAIGN
%EMAIL%
ACXIOM
mid=<DI_MEMBER_ID/>
ADESTRA
[*data('email')*]
AWEBER
{!email}
BENCHMARK EMAIL
[contact_attribute: Email Address]
BLUE HORNET
%%to_email%%
BRONTO
%%!contact_email%%
CAMPAIGN MASTER
[!EmailAddress!]
CAMPAIGN MONITOR
[email]
CAMPAIGNER
[Contact.Email]
CHEETAHMAIL
%%email%%
CLEARWEBB
$email
CONSTANT CONTACT
$Subscriber.EMAIL
CONVIO LUMINATE
[[S1:primary_email]]
DOTMAILER
@EMAIL@
ELOQUA
<span class=eloquaemail>EmailAddress</span>
EMARSYS
$E-Mail$
EMERCURY
%email%
EMMA
[[email]]
EWAYDIRECT
<%=subscriber.email%>
EXACTTARGET
%%emailaddr%%
EXPERTSENDER
*[subscriber_email]*
GETRESPONSE
[[email]]
HUBSPOT
{{contact.email}}
ICONTACT
[email]
INFUSIONSOFT
~Contact.Email~
LISTRAK
#Listrak\Email#
LYRIS HQ
%%EMAIL_ADDRESS%%
LYRIS LM
%%emailaddr%%
MAD MIMI
(email)
MAILCHIMP
*|EMAIL|*
MAILIGEN
#[EMAIL]#
MAILINGREPORT
{{contact.email}}
MAILJET
[[EMAIL_TO]]
MARKETO
{{lead.Email Address:default=noemail}}
NATIONBUILDER
{{ recipient.email }}
PARDOT
%%email%%
PULSECONNECT
[-EMAILADDR-]
PURE360
{~email~}
RESPONSYS
$EMAIL_ADDRESS_$
SAILTHRU
{email}
SALSA
[[Email]]
SDL EMAIL MANAGER
{toemail}
SELLIGENT
~MAIL~
SENDBLASTER
#email#
SILVERPOP
%%Email%% -
SMARTFOCUS (FORMERLY EMAILVISION)
[EMV FIELD]EMAIL[EMV /FIELD]
SMARTSOURCE
@[EMAIL]
SPLIO
$email$
STREAMSEND
{{contact.{email_address}}}
STRONGVIEW
##email##
TIKIT EMS
~emailAddress~
VERTICAL RESPONSE
{EMAIL_ADDRESS}
WHATCOUNTS PROFESSIONAL
%%$email%%