SMTP Maximum Per Send

[abbaddon223]

Hi experts,

I'm using VBA and XML to send emails from my db to a legitimate mail server (Mandrill).

The mail server will accept any number of receipients in one go.

I'm using an SQL string to build up my recipients into one large string (phil@test.com; fred@test.com etc). This works well as it builds them list at about 50 per second.

The issue I have is that I get an error saying 'Too many recipents'.

How many will SMTP let me send in one go?

Thank you for any help.

 

[PeterF]

By default a SMTP server is limited to 100 recipients (M$ claims it can do up to 300), this to prevent dictionary attacks.
The available memory on the server can limit the number of recipients if the mail adresses are long strings.