>>17867037
Connecting to 17.42.251.62
220 iCloud iscream SMTP proxy - p00-iscream-smtp-5695cb4b-s45f2 3.5.0 (2303B21-1279d9d74454) [111 ms]
EHLO keeper-us-east-1d.mxtoolbox.com
250-p00-iscream-smtp-5695cb4b-s45f2
250-PIPELINING
250-SIZE 28311552
250-ETRN
250-STARTTLS
250-AUTH LOGIN PLAIN ATOKEN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250 CHUNKING [124 ms]
MAIL FROM:<supertool@mxtoolboxsmtpdiag.com>
250 2.1.0 Ok [124 ms]
RCPT TO:<test@mxtoolboxsmtpdiag.com>
550 5.1.1 <test@mxtoolboxsmtpdiag.com>: user does not exist [696 ms]
LookupServer 1290ms