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Introduction

Most of hosting companies (almost all of them) apply some restrictions to the send process so you won't be able to send a lot of e-mails at once (this limitation is usually around 300 e-mails per hour). This article will explain you how AcyMailing sends your e-mails and how you can overcome any server limitation.

 

First of all, AcyMailing always uses a queue to send your e-mails.
So, if the message can not be sent immediately (time out, limitation of a shared hosting environment, memory limitation, etc.), AcyMailing will keep it in the queue so you will be able to send it later.
If you are reading this article because you saw a lot of errors during the send process and the process stopped, don't panic! You will be able to easily resume your send process and you won't loose any message.

In some cases, the mail server does not return a failed status to AcyMailing so AcyMailing will consider that all your e-mails have been sent properly and won't be able to stop the send process automatically. In that case, it's very important to configure AcyMailing to respect your sending limitations.

You can see and manage your queue of messages by clicking on the queue menu on the AcyMailing back-end.

 

Using AcyMailing Starter (free version)

If you use AcyMailing Starter or our commercial version (without the Automatic Only option) and you send a Newsletter, AcyMailing will open a popup and start sending your Newsletter to your users.
It will send one batch of e-mails then make a pause and then refresh the page and send another batch of e-mails and make a pause and refresh the page... until the end of the process.

manual send process

If AcyMailing detects errors during the process, it will either automatically refresh the page (to avoid a time out for example) or stop the sending process (if a hosting limitation is detected). In both cases AcyMailing should display you a clear message about what's going on and if AcyMailing stopped the send process, you will be able to resume it by clicking on the Process button on the queue page.

During the send process, the sending window (the popup) should always stay opened.
If you close it, AcyMailing will finish the current batch and then stop the send process.
That's not a problem as you will be able to resume it anyway.
If you want to be able to log out, turn off your computer and let Acy do the job, you will have to go for one of our paid version.

 

Using one of our commercial versions

Using one of our commercial versions (AcyMailing Essential, Business or Enterprise), you will be able to configure AcyMailing to automatically overcome any server limitation and you won't have to keep your internet connection opened during the send process.
We even recommend you to use this method if you have a dedicated server as it will lower your spam score, it spreads the load on the server and also the traffic that's being generated from the newsletters.

If you use AcyMailing to send e-mails from the front-end, it will always use the Automatic process but you should still configure a cron task to trigger AcyMailing regularly.

  • Go on your AcyMailing Configuration page and click on the tab Queue process
  • Select the option Queue processing : Automatic Only

    autosend

  • Using this option, if you send a Newsletter, AcyMailing won't even start the send process but will simply add all your e-mails in the queue and display you a confirmation message.
  • Now we will need a system to automatically trigger AcyMailing and enable it to automatically send your e-mails, this is what we call a cron task.
    So each time AcyMailing will be triggered, it will send X e-mails.
    That way, you will be able to configure AcyMailing to send 200 e-mails per hour or anything else which suits your hosting limitations.
  • The frequency you can see on the automatic send process configuration is a security parameter for AcyMailing.
    It's set by default to 15 minutes as our own cron service enables you to create a cron task with a 15 minutes frequency.
    This parameter is only there to avoid having someone else triggering your send process more often than it should be.
    You should set this parameter with the same value as your cron frequency.
    • On this same "Queue process" tab, you will see below an area "Cron"
    • On this interface you will be able to see the last report of the cron task, you will see your Cron URL (which is the url you should trigger every X minutes if you want to create your own cron task), you will see the last run time, etc.

  • Now the only thing you have to do is to configure a cron task.
    You can handle it on your own server or you can let our server do the job for you (We created a free and easy service on Acyba.com to avoid you spending time on that part as it can be technical depending on your hosting company).

     

Hosting limitations and corresponding AcyMailing configuration

Depending on your hosting limitations, you can optimize the AcyMailing send process.

We recommend you to keep 5% of e-mails for your other components (send passwords, registration confirmation...) so if your limitation is 250 e-mails per hour, you should not use more than 240 e-mails for AcyMailing.

Each batch should not send more than 250 e-mails.
It's always better to increase your frequency than increasing the number of e-mails per batch.

 

Here is the optimal configuration you should use based on the hosting company you are using for your website :

Hosting Company Limitations Send X e-mails every Y minutes Configuration / Observation
1and1 100 per task
200 per hour
95 e-mails / 30 minutes  
Amazon SES    
  • Method : SMTP
  • Server : email-smtp.us-east-1.amazonaws.com
  • Port : 465
  • Secure method : SSL
  • Authentication : Yes
  • Username/Password provided by Amazon SES
BlueHost 150 per hour 70 e-mails / 30 minutes  
DreamHost 50 per hour 45 e-mails / 1 hour Do not leave the bounce e-mail address field empty!
Free.fr

20 per task
100 per hour
2000 per week

18 e-mails / 15 minutes If you're using your own cron or the manual send process, you can send 15 e-mails every 10 minutes
GMail 100 per hour
500 per day

48 e-mails / 30 minutes
20 e-mails / 1 hour (>500 users)

  • Method : SMTP
  • Server : smtp.gmail.com
  • Port : 465
  • Secure method : SSL
  • Authentication : Yes
  • Your GMail username/password
Google Apps
for Business
or Education editions
2000 per day

80 e-mails / 1 hour

 

GoDaddy

100 per task
1000 per day
95 e-mails / 15 minutes
40 e-mails / 1 hour (>1000 users)
  • Method : SMTP
  • Server : relay-hosting.secureserver.net
  • Port : 25
  • Secure method : No
  • Authentication : No
  • Your from and reply-to e-mail should belong to your own domain

Goneo

250 per hour 60 e-mails / 15 minutes
  • Method : php Mail Function
  • Your from, reply-to and bounce back e-mail addresses should belong to your own domain
  • Do not leave the bounce e-mail field empty!

GreenGeeks

100 per hour by default 45 e-mails / 30 minutes  
Host Gator 500 per hour 115 e-mails / 15 minutes  
Host Monster 500 per hour 115 e-mails / 15 minutes  
Hosting 2GO 50 per 15 minutes 45 e-mails / 15 minutes  
Hotmail 100 per day   Due to this limitation, you should not use Hotmail as smtp server.
Locaweb 100 per hour 45 e-mails / 30 minutes  
Lunarpages 20 per task
600 per hour
19 e-mails / 15 minutes You can use your own cron task to have a better frequency (every 2 minutes)
Lypha 2000 per hour 400 e-mails / 15 minutes  
Maven Hosting 500 per hour 115 e-mails / 15 minutes  
Netissime 500 per 15 minutes
1000 per day

100 e-mails / 15 minutes

40 e-mails / 1 hour (>1000 users)

 
Office 365    
  • Method : SMTP
  • Server : smtp.office365.com
  • Port : 587
  • Secure method : TLS
  • Authentication : Yes
  • Your username/password
One.com 25 per 5 minutes

24 e-mails / 15 minutes

You can use your own cron task to have a better frequency (every 5 minutes)
OVH via smtp 100 per hour and
Pack Perso: 500 per day
Pack Pro: 500 per day
Pack Business: 1200 per day
Pack Premium: 2000 per day

 

20 e-mails / 1 hour
20 e-mails / 1 hour
48 e-mails / 1 hour
80 e-mails / 1 hour

  • Method : SMTP
  • Server : smtp.yourdomain.com
  • Port : 587
  • Secure method: none
  • Authentication : Yes
  • Your username/password
OVH via phpMail

The process will be blocked if more than 5% of your messages bounce

But you can easily unblock it on your account at:
Manager v3 > Mutualisé > Récapitulatif > Hébergement > Suivi Emails Automatisés.

up to you!
No more than 150 e-mails per batches

  • Method : php Mail function

Using this sending method, OVH will overwrite the bounce e-mail address so all delivery failures will be handled by OVH.
You could then export the file generated by OVH and import it in Acy using our universal filter plugin but you won't be able to use our automatic bounce handling (you could use the smtp function then... but you will have stronger limitations).

PHPNet 100 per hour 50 e-mails and 2 second pauses between each batch with the manual send process E-mails are added to their own queue so you can send as many e-mails as you want and then their server will deliver automatically 100 e-mails per hour
Rochen 100 per 10 minutes
1000 per day
95 e-mails / 15 minutes
40 e-mails / 1 hour (>1000 users)
 
Site5 1000 per hour 240 e-mails / 15 minutes Your from and bounce e-mail address should belong to your own domain
Siteground 400 per hour 95 e-mails / 15 minutes  
Techark 250 per hour 60 e-mails / 15 minutes  
VCServer Network 100 per hour 45 e-mails / 30 minutes  
Webcity 20 per 6 minutes 19 e-mails / 15 minutes You can use your own cron task to have a better frequency (every 8 minutes)
Yahoo 100 per hour 95 e-mails / 1 hour  


Your Cron frequency and the frequency displayed on the configuration should be the same.
Please do NOT take this information for granted, as your email account provider or hosting company can change its email policy without any prior notification.
It is always a good idea to contact your email account provider or hosting company and ask about the email send rate, before proceeding with a mass email campaign.

 

Tired of your hosting sending limitations? You can connect AcyMailing to an external delivery service...

Frequently Asked Questions

My sending limitations are 300 e-mails per hour and I use your commercial version, how do I configure AcyMailing?

With a limitation of 300 e-mails per hour, we recommend to configure AcyMailing to send 280 e-mails per hour so 70 e-mails every 15 minutes.

  • Go on the AcyMailing configuration page, tab "Queue Process" :
    • Queue processing : Automatic Only
    • Send 70 e-mails every 15 minutes
    • Click on the button "Create/Edit your cron task", select the frequency "15 minutes" in the popup and click on the button "save"
  • Save the AcyMailing configuration page to apply the changes.

Example

I don't have any limitation, what configuration do you recommend with your commercial version?

Even if you don't have any sending limitation, we don't recommend you to send more than 300 e-mails per batch. Why?

  • To reduce the probability to be flagged as a spammer
  • To spread the load on the server
  • To spread the traffic that's being generated from the newsletters

If you don't mind your send process to take an entire day (or even more), the best configuration is usually to send 120 e-mails every 15 minutes.

  • Go on the AcyMailing configuration page, tab "Queue Process" :
    • Queue processing : Automatic Only
    • Send 120 e-mails every 15 minutes
    • Click on the button "Create/Edit your cron task", select the frequency "15 minutes" in the popup and click on the button "save"
  • Save the AcyMailing configuration page to apply the changes.

You can increase your number of e-mails per task if you want to speed up the send process and/or create your own cron task with a frequency of 5 minutes.

 

Do I have to keep the window open during the send process or can I log out?

It depends on the sending method you're using.

  • If you use our free version, you will use the "manual" sending method so if you close the window then the send process will stop.
  • If you use our commercial version and use the "automatic only" send process, then AcyMailing will add your e-mails in the queue and take care of the send process using a cron task.
    So you can log out, turn off your computer and do something else.

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