In Percona’s white paper “Performance at Scale: Keeping Your Database on Its Toes,” we take a high-level approach to what you need to think about when planning for database scalability.
Does not the "250-AUTH" line indicate that the server accepts authentication?
[000.521] --> EHLO checktls.com [000.546] <-- 250-mail.hprs.local Hello www3.checktls.com [126.96.36.199], pleased to meet you 250-ENHANCEDSTATUSCODES 250-PIPELINING 250-8BITMIME 250-SIZE 250-DSN 250-ETRN 250-AUTH DIGEST-MD5 CRAM-MD5 250-STARTTLS 250-DELIVERBY 250 HELP
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