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via Google Groups by Paolo Proni, 2 years ago
501 helo requires domain address
via java-samples.com by Unknown author, 1 year ago
530 5.7.0 Must issue a STARTTLS command first. jm5sm18410921pbc.1
via Oracle Community by 843830, 2 years ago
530 5.7.0 Must issue a STARTTLS command first
Empty query.