- trying abc.us - connected to abc.us <220-cp15m2.lowesthosting.com ESMTP Exim 4.89_1 #1 Thu, 03 May 2018 09:29:03 -0500 <220-We do not authorize the use of this system to transport unsolicited, <220 and/or bulk e-mail. >EHLO abc.us <250-cp15m2.lowesthosting.com Hello cp15.lowesthosting.com [69.41.190.211] <250-SIZE 52428800 <250-8BITMIME <250-PIPELINING <250-AUTH PLAIN LOGIN <250-CHUNKING <250-STARTTLS <250 HELP >STARTTLS <220 TLS go ahead >EHLO abc.us <554 Security failure