relay.free-online.net not sending emails

[#1]

I changed password so can now get into emails and receive, but can't send them by webmail or by client.

relay.free-online.net appears with 'offline' beside it in client.

When I try to send, am asked for password, but this is never accepted.

With webmail, I get "SMTP Error (535) Authentication failed".

Please advise.

[#2]

Seems to be OK this morning.

[#3]

Happening again – being asked for password to send emails and it not being recognised.