This is my list of bulk emailing software
- Groupmail - Free version is heavily limited to a 100 emails a group, i think
- Sendblaster - Free version is heavily limited
- Big Mass Mailer - Fre and opensource but has not been updated in a while
- OpenEMM - e-mail & marketing automation - I think this is a full emailing systems for marketing and is opensource
- Free Bulk Email Software Download - Not Tried this but there is also a 'Bulk Email Verifier'
- Bulk Mailer - Free Bulk Email Software Download - Not tried this