I have had Roundcube for a long time working flawlessly, but within the last few days I have been unable to send email, (receiving and viewing emails fine) the following message appears in the error log:
SMTP Error: SMTP error: Authentication failure: SMTP server does no support authentication
in /homepages/xx/xxxxxxxxx/htdocs/xxxxxxx/rcube/program/steps/mail/sendmail.inc on line 253.
I use 1and1 (US) as my provider. I know it probably isn't a Roundcube issue, but I am trying to figure out where to start looking at the issue??
Thanks,
JD