I can't send emails.
I can't send emails. started 3 days ago.
An error occurred while sending mail: The mail server sent an incorrect greeting: Cannot connect to SMTP server 2001:558:fe21:2a::5 (2001:558:fe21:2a::5:25), connect error 10060.
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Wšykne wótegrona (3)
A quick search on the internet indicates that 'connect error 10060' is generated by a Windows computer when your connection to the mail server can't be established. There's a previous post here about a similar error message: https://support.mozilla.org/en-US/questions/1098845 I don't know if the remedies that worked in that case will help you. I can't advise further I'm afraid, I don't use Windows software and have never had this problem myself.
You're trying to connect to an IPv6 address. Is this intentionally?
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found prob.
Outgoing SMTP dropped my email address somehow.