"Over the years Gammadyne has become a mission critical piece of software to our operations."
- David Goodale
- David Goodale
"Finding Gammadyne Mailer was like a dream come true for us."
- Jonathan Deitch
- Jonathan Deitch
"Gammadyne is absolutely the BEST bulk email solution out there."
- Cindy Papenheim
- Cindy Papenheim
Throttling
Gammadyne Mailer has the ability to throttle (limit) the rate that emails are sent. Because some servers reject emails when too many arrive too fast, this increases the number of emails that are successfully delivered, thereby improving the overall response rate to your email campaign. It also reduces the chance of your mail server becoming blacklisted. Once blacklisted, your delivery success rate will be dramatically reduced. For these two reasons, it is very important to use Gammadyne Mailer's throttling capabilities.
Following are the various methods that can be used. You may use multiple methods if you like - Gammadyne Mailer will make sure that all throttles are satisfied before sending an email.
Following are the various methods that can be used. You may use multiple methods if you like - Gammadyne Mailer will make sure that all throttles are satisfied before sending an email.
Method #1: The Universal Domain Throttle
This feature will ensure that no individual mail server will receive too many messages too fast. Every domain that you send email to will have its own separate and independent throttle. For example, Gmail, Yahoo, and Hotmail will all have their own throttles. An email sent to one of these domains will not slow down the delivery rate to the others. This is the preferred method of throttling because it achieves the highest success rate with the least impact on the delivery speed.
To configure it, go to the Send/Throttles branch and check the "Universal Domain Throttle" box. By default, this feature is configured to send 1 email every 4 seconds. We recommend you stick with this default.
New in 53.0: Gammadyne Mailer can now detect broad email systems that have multiple domains and IP addresses. The entire mail system will now share a single throttle. This is especially important when sending to domains that have their email service provided by Office 365 or Gmail. The improved method will result in better delivery success rates and less likelihood of blacklisting.
New in 60.0: Gammadyne Mailer now supports a range for the Count or Period or both, and the throttle will change over the course of the mailing list. An example would be "1-20". Each recipient will calculate the value to be somewhere between 1 and 20, rounded to the nearest integer. So in this example, the first recipient will use the value "1", the last recipient will use the value "20", and the recipient in the middle of the list will use the value "10". This feature is useful for warming up the SMTP server's IP address slowly.
To configure it, go to the Send/Throttles branch and check the "Universal Domain Throttle" box. By default, this feature is configured to send 1 email every 4 seconds. We recommend you stick with this default.
New in 60.0: Gammadyne Mailer now supports a range for the Count or Period or both, and the throttle will change over the course of the mailing list. An example would be "1-20". Each recipient will calculate the value to be somewhere between 1 and 20, rounded to the nearest integer. So in this example, the first recipient will use the value "1", the last recipient will use the value "20", and the recipient in the middle of the list will use the value "10". This feature is useful for warming up the SMTP server's IP address slowly.
Method #2: The Individual Domain Throttles
It is possible to create a throttle for one or more target domains. Go to the Send/Throttles branch, and click the "Add" button at the bottom of the table. In the Domain column, enter the domain name that you wish to throttle the delivery rate to (e.g. "gmail.com"). In the Throttle Count column, enter the maximum number of emails that should be sent during the Throttle Period. In the Throttle Period column, enter the number of seconds over which no more than Throttle Count emails will be sent to the domain.
It is generally better and easier to use the Universal Domain Throttle. There is no way to know the optimal delivery rate for every domain on the Internet. If there is a particular domain that you are having trouble with, you can use this table to give it a more restrictive throttle. Any domain listed in the table will take precedence over the Universal Domain Throttle, so it is perfectly okay to use both.
It is generally better and easier to use the Universal Domain Throttle. There is no way to know the optimal delivery rate for every domain on the Internet. If there is a particular domain that you are having trouble with, you can use this table to give it a more restrictive throttle. Any domain listed in the table will take precedence over the Universal Domain Throttle, so it is perfectly okay to use both.
Method #3: Relay Throttles
It is possible to throttle the delivery rate to one or more relaying SMTP servers. This is useful for reducing the load on your mail server. It is especially important if the SMTP server imposes a limit.
To configure a relay throttle, go to the Servers/SMTP branch and check the "Use Project SMTP Settings" box. For each relaying mail server, click the "Add" button at the bottom of the table. Fill in the Server Name, Port, Authentication, User Name, and Password columns with the correct settings. In the Throttle Count column, enter the maximum number of emails that should be sent during the Throttle Period. In the Throttle Period column, enter the number of seconds over which no more than Throttle Count emails will be sent to the domain.
For example, if you are relaying emails through Gmail, you are only allowed to send 100 per day. The Throttle Count column should be "100". The Throttle Period column should be "86400".
To configure a relay throttle, go to the Servers/SMTP branch and check the "Use Project SMTP Settings" box. For each relaying mail server, click the "Add" button at the bottom of the table. Fill in the Server Name, Port, Authentication, User Name, and Password columns with the correct settings. In the Throttle Count column, enter the maximum number of emails that should be sent during the Throttle Period. In the Throttle Period column, enter the number of seconds over which no more than Throttle Count emails will be sent to the domain.
For example, if you are relaying emails through Gmail, you are only allowed to send 100 per day. The Throttle Count column should be "100". The Throttle Period column should be "86400".
Method #4: Pulsing
It is possible to automatically pause the campaign after sending a certain number of emails. Go to the Send/Throttles branch and check the "Pulse" box. Enter the number of emails that should be sent, and how long the pause should be (in seconds). For example, if you enter "50" in the Emails field and "5" in the Pause field, the Send Operation will pause for 5 seconds between each batch of 50 emails.
This method is primitive and in all respects inferior to the Universal Domain Throttle.
