Node Red E-mail Node Suddenly Timing Out

Been using the e-mail node for several months to report various alarm conditions on my vessel monitoring system. Have not changed nodes doring that time. Suddenly it is getting "Error: queryA ETIMEOUT" after about a minute from the moment the "send" is initiated. I verified my node continues to contain the following settings as defined by office365.
To send emails using Office365 server enter these details:

SMTP Host:
SMTP Port: 587
SSL Protocol: OFF
TLS Protocol: ON
SMTP Username: (my Office365 username)
SMTP Password: (my Office365 password)

I inserted a new email send node in parallel with the failing node and both got the same timeout result. I then changed the new email node userID and Password to another of my e-mail accounts on the same office365 service; same timeout result for both nodes again.

I went outside node-red and successfully sent and received e-mails on the sending usernames and passwords.

Just wondering if anything changed regarding this node and its interface with office365? I saw a couple other posts regarding e-mail server timeout but they didn't seem to answer my situation.

Thank you

Quick follow-up - I reverted from WiFi RasPi connection to wired and it is now working again. I'll have to dig into the wifi configuration to see what is going on.

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