Knowledge Base


Question / Problem

Sending out 6,000 emails using scheduled processing at quantity 35 every 2 minutes. After around 500 or so messages sent, we get an SMTP Server Error #10053. What is this and how do we resolve it?

Answer / Solution

Error#10053 means "A connection abort was caused internal to your host machine. The software caused a connection abort because there is no space on the socket 's queue and the socket cannot receive further connections." The SMTP server closed the connection.Some providers have a limit for sending mails within a certain time span. Some onlypermit 50 mails per hour,others onlypermit 500 mails within 24 hours/a day.
Please make sure that your provider does not have such a limit. It looks like there is a limit of 500 mails per day. Also check if you have an anti-virus software a firewall/internet security installed which may have a similar limit.