How many messages can the software send per hour?

We often receive questions about the speed of the program. The answer is: it depends.

Using SMTP:

Not MailList Controller defines the speed, its the environment. The message speed depends on the internet connection (upload speed), the connection to your mailserver, the mailservers performance and the size of the message.

Samples:

• a DSL connection has a speed of 2048/256 kbit/s
  this means the upload speed is 256 kbit/s, which equals 256 kbit/s /8 = 32 kbyts/s
  if the message has a size of 32 kbyte, then you can send (theoretically) 1 message with a size of 32 kbyte per second
  
  
• Upload speed: 512 kbit/s = 64 kbyts/s
  
  
• Upload speed: 1024 kbit/s = 124 kbyte/s
  
  

If you have a mailserver in your local network, then the speed is very high. You could send out a large number of messages within a short time. In some cases it could be required to slow down or limit the speed. MaillList Controller has such options to define a slowdown or limit the max. number of messages per hour.

Hint: Some anti-virus programs, which have an option to "scan outgoing messages" have problems with a larger number of messages and can slow down the send speed.

Please note, that the program cannot send out more messages as your mailserver allows. Some mailserver have limits, e.g. some allow to send only x messages per hour. Please use the List Settings -> Outgoing Messages (SMTP) -> Limit feature to adjust the program to any limit.

Mailserver Pickup Directory:

This option can be used if you are running a local mailserver, which has a pickup directory. In this mode, the program does not send using SMTP. It creates a .eml file in the pickup directory for each message, which will be used directly by your mailserver. The mailserver picks up the .eml file and sends it.

MailList Controller will create the messages in the pickup directory very fast: up to 100.000 messages in less than 5 minutes, so it might be required to slow down or limit the number of messages per hour, if your server runs out of resources.

This option is the fastest way to send out messages if you are running a local mailserver, which has a pickup directory. Please note, that the program does not receive any confirmation from your mailserver and your mailserver is responsible for sending out the messages an error processing. Please refer to the user manual of your mailserver for further details.