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I am using a Gmail address for our board, and it was working. However, now the mail log is showing these errors:

Quote:The mail server does not understand the RCPT TO command. Reason: 550-Please turn on SMTP Authentication in your mail client, or login to the 550-IMAP/POP3 server before sending your message. lotus.x10hosting.com 550-(tls://smtp.gmail.com) [184.154.58.130]:46281 is not permitted to relay 550 through this server without authentication.
and
Quote:The SMTP server rejected the supplied login username and password. Reason: 535 Incorrect authentication data

I haven't changed my password or anything. What is going on?
Seems like it could be a problem with your server. Are you on shared hosting? If so, try contacting your host.
I had pretty much decided that it must be my server. Thank you for confirming that.