Could not complete sender verify ?

[Administrator]

Any suggestions for the following issue ?

2017-12-26 23:55:44 H=mail-qk0-f171.google.com [209.85.220.171]:41281 I=[108.178.38.194]:25 sender verify defer for <procuresens@safalsoftcom.com>: host lookup did not complete
2017-12-26 23:55:44 H=mail-qk0-f171.google.com [209.85.220.171]:41281 I=[108.178.38.194]:25 X=TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128 CV=no F=<procuresens@safalsoftcom.com> temporarily rejected RCPT <venquiry@vistech.in>: Could not complete sender verify

[Nitesh]

Seems like the domain safalsoftcom.com does not have a valid DNS record due to which your server is unable to resolve the hostname and was not able to complete the sender verification.

You can verify this using online tools like intodns.com or centralops.net

[Administrator]

Yes it was the A record which was not resolving. Hence the host look up did not complete error was coming.