Sometimes our customers complain about slow message sending with G-Lock EasyMail7. We investigate the issue and often discover that the problem is in a big message size and slow Internet connection the user has.
In most cases the big message size is caused by images used in the message. If the message has several images with a big size, so you can expect your message will "weight" much.
The solution is to optimize the images and upload them to your web server.
I did a case study to demonstrate you how the optimization of the images and uploading them to a web server helps decrease the message size in almost 10 times, and consequently, speed up the message sending and save you money for data traffic if you are sending through a paid SMTP server like Amazon SES.
Read about my case study below.