I am trying to send ~10 emails from php. It sends the first two emails but then after that I get "Swift_TransportException with message 'Connection could not be established with host smtp.zoho.com [ #0]'" .
I was told that it is most likely because of a limit on the amount of messages I can send per some time block (like 30 seconds). Is this true? I haven't been able to find any limit like this in zoho documentation.
EDIT: There must be some kind of limit like this because I added sleep(45)
between every mail send call and now it works.
This is different from the duplicate question that is being suggested because it refers specifically to ZOHO/hosts limits in sending multiple emails in a short time span.