Authenticate domain with Mailerlite, but TXT box is too small to contain the entire DKIM string Anonymous 2 years ago updated 2 years ago Answered Hi there, I'm trying to authenticate my domain with Mailerlite, but when I add a new DNS entry on the Inmotion Cpanel, the TXT box is too small to contain the entire DKIM string. I tried to split it across 2 text boxes, but then the string is interrupted by a space which won't authenticate.Thanks for any input!Marion