An SPF (Sender Policy Framework)

Solution

An SPF (Sender Policy Framework) record is a list of servers that are allowed to send e-mail from your domain.

For your issue,seems the recipient set the filtering rule too strict which checking on SPF per bounce error provided:

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550 Not verified by SPF.
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This also reduces spam activity that may be perceived to originate from your domain, which is known as source address spoofing.

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Article details

Article ID:	184
Category:	Web Hosting Issues
Date added:	2016-11-29 01:44:06
Views:	178
Rating (Votes):	(0)

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