ESP - Differences in use and support level
Supported ESP in alphabetical order:
ActiveCampaign, APSIS, AWwber, Campaign Monitor, Ecomail, ExpertSender, GetResponse, GetResponse, Hubspot, Maileon, Mail-Frog, MailChimp, Mailkit, Silverpop (IBM/Watson Campaign Automation), Sendmail, Sendy, SmartEmailing
ActiveCampaign, APSIS, AWwber, Campaign Monitor, Ecomail, ExpertSender, GetResponse, GetResponse, Hubspot, Maileon, Mail-Frog, MailChimp, Mailkit, Silverpop (IBM/Watson Campaign Automation), Sendmail, Sendy, SmartEmailing
List of differences using specific ESP (Email Service Provider)
Mailkit
Mailkit is well-supported ESP by Mailocator on enterprise leveldelivery using sys_ and opt_ are fully supported
duplicity check and multiple verification is available
multi-step popup supported
100% GDPR compliant
if promocodes are switched on, promocode is delivered always into custom25 field (there is no filed named 'promocode' in Mailkit)
Maileon
Maileon is well-supported ESP by Mailocator on high leveldelivery using opt_ is supported
duplicity check and multiple verification is available
in multi-step popup supported
mailing automation over Mailocator is under development
IBM Silverpop
Silverpop is well-supported ESP by Mailocatordelivery using opt_ is supported
duplicity check is available
multi-step popup supported over specific cookie to overstep bug in Siverpop environment
MailChimp
MailChimp is well-supported ESP by Mailocatordelivery using opt_ and sys_ is supported
duplicity check is available
multi-step popup supported
only double opt-in is supported/allowed