I am having difficulty sending an e-mail using the PHP mail function with a message length exceeding 10,000 characters. A message with a length of 10,000 characters works, but one with a length of 20,000 characters doesn’t. I have checked with my Web Host Provider, 1and1 Internet, and have been told that they place no limit on the length of e-mails sent. I have also ensured that the line length does bot exceed 70 characters.
Any ideas please?