Error sending email. - SmarterTools

Hi, i am getting error while sending emails as below. Error shows data transfer failed. Issues appears random, not for all emails. Incoming IP is already whitelisted and authentication is bypassed.

[2016.02.17] 02:52:25 [27.54.171.56][60492495] rsp: 220 mail.xyz.com

[2016.02.17] 02:52:25 [27.54.171.56][60492495] connected at 2/17/2016 2:52:25 AM

[2016.02.17] 02:52:25 [27.54.171.56][60492495] IP in whitelist

[2016.02.17] 02:52:25 [27.54.171.56][60492495] IP in authentication bypass

[2016.02.17] 02:52:26 [27.54.171.56][60492495] cmd: EHLO otrs.xyz.com

[2016.02.17] 02:52:26 [27.54.171.56][60492495] rsp: 250-mail.xyz.com Hello [xxx.xxx.xxx.xxx]250-SIZE 31457280250-AUTH LOGIN CRAM-MD5250-8BITMIME250 OK

[2016.02.17] 02:52:26 [27.54.171.56][60492495] cmd: AUTH CRAM-MD5

[2016.02.17] 02:52:26 [27.54.171.56][60492495] rsp: 334 PDE1MjYwMjg3MTcuNjM1OTEyNzQzNDYzMDM3MTA5QG1haWwudmFzdWRldmdsb2JhbC5jb20+

[2016.02.17] 02:52:26 [27.54.171.56][60492495] Authenticating as noc@xyz.com

[2016.02.17] 02:52:26 [27.54.171.56][60492495] rsp: 235 Authentication successful

[2016.02.17] 02:52:26 [27.54.171.56][60492495] Authenticated as noc@xyz.com

[2016.02.17] 02:52:26 [27.54.171.56][60492495] cmd: MAIL FROM:<noc@xyz.com>

[2016.02.17] 02:52:26 [27.54.171.56][60492495] rsp: 250 OK <noc@xyz.com> Sender ok

[2016.02.17] 02:52:27 [27.54.171.56][60492495] cmd: RCPT TO:<abc@xyz.com>

[2016.02.17] 02:52:27 [27.54.171.56][60492495] rsp: 250 OK <abc@xyz.com> Recipient ok

[2016.02.17] 02:52:27 [27.54.171.56][60492495] cmd: RCPT TO:<abc.@xyz.com>

[2016.02.17] 02:52:27 [27.54.171.56][60492495] rsp: 250 OK <abc.@xyz.com> Recipient ok

[2016.02.17] 02:52:27 [27.54.171.56][60492495] cmd: RCPT TO:<.abc@gmail.com>

[2016.02.17] 02:52:27 [27.54.171.56][60492495] rsp: 250 OK <.abc@gmail.com> Recipient ok

[2016.02.17] 02:52:27 [27.54.171.56][60492495] cmd: DATA

[2016.02.17] 02:53:00 [27.54.171.56][60492495] rsp: 354 Start mail input; end with <CRLF>.<CRLF>

[2016.02.17] 02:53:00 [27.54.171.56][60492495] data transfer failed.

[2016.02.17] 02:53:00 [27.54.171.56][60492495] disconnected at 2/17/2016 2:53:00 AM

Hemen Shah Replied

2/18/2016 at 5:40 AM

Error "data transfer failed" remains an unsolved mystery as lot of things are involved in this, you will find various posts on this and this issue is SM related or client side related needs to be identified which is very difficult atleast from my experience.

If you are facing this from particular customer then try changing the ISP or may be changing the router if it resolves.

Thanks

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