You can also use the mailPro plugin of DrMaison, that one, opens the smtp connector only once, send your email in bunches and close the smtp connector again.
The mail-plugin of Servoy, does opening & closing the smtp connector for every email, which also, slows it down.
Also the mailPro plugin, can send email in the background (in a separate thread) which is very fast!!
We have built (a while ago) a send mailletter solution, that sends 50.000 emails, every month! How quick that goes, does also, totally depends on what mail/smtp-server you use, and what kind of bandwith you have.
Servoy can handle this really fast, but sometimes, slower smtp servers, also queues, the mail, and send it one-by-one.
More advanced mail-servers, can send email in multiple threads....
Also be aware that some internet providers, are locking you down, when you send more than 1000 mails or so, in an hour. (Most of the time, that suggests you have somekind of unwanted bot-virus)
(dont' blame me for spamming!!
)