On 14 Jun2019, at 07:24, klirstr <klir...@gmail.com> wrote: > host smtp.customerdomain.com[customer-mx-server-ip] said: 450 4.7.1 > <u...@customerdomain.com>: Recipient address rejected: > SPF-Result=smtp.mydomain.com: 'SERVFAIL' error on DNS 'TXT' lookup of > 'smtp.mydomain.com' (in reply to RCPT TO command)) > u...@customerdomain.com
You have obfuscated all the detail that would allow someone to answer this. Without the actual error, unobfuscated at least as far as the domain names involved, there’s no way to know what the problem is. At a guess, yours pf records are incorrect, but they might just not be up to the (possibly arbitrary) standard of the other mail server. -- "Whose motorcycle is this?" "It's chopper, baby." "Whose chopper is this?" "It's Zed's." "Who's Zed?" "Zed' dead, baby. Zed's dead.”
