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I have googled this widely :/ I have a Wordpress site, but the same happens from the command line. Sending a mail that ends up at the MX of:
mysite.com. 140 IN MX 1 aspmx.l.google.com.
Leads to google saying:
Jun 12 16:06:48 mysite sm-mta[690]: x5CG6mcq000688: x5CG6mcq000690: DSN: Service unavailable
And a message in root's inbox of:
----- Transcript of session follows -----
... while talking to aspmx.l.google.com.:
>>> DATA
<<< 550-5.7.1 [2a00:1098:88:1a::1] Our system has detected that this message does
<<< 550-5.7.1 not meet IPv6 sending guidelines regarding PTR records and
<<< 550-5.7.1 authentication. Please review
<<< 550-5.7.1 https://support.google.com/mail/?p=IPv6AuthError for more information
<<< 550 5.7.1 . m1si30413wml.153 - gsmtp
554 5.0.0 Service unavailable
--x5CG6mcq000690.1560355608/mysite.vs.mythic-beasts.com
I have a TXT record of:
mysite.com. 300 IN TXT "v=spf1 include:_spf.google.com ~all"
as recommended by a random site. I've tried the Google instructions to no avail.
Any thoughts?
The error specifically talks about IPv6 guidelines. Does an IPv4 TXT SPF record satisfy this? – I say Reinstate Monica – 2019-06-12T16:29:42.007
@TwistyImpersonator: They've changed the actual support page to no longer list IPv6-specific requirements. – user1686 – 2019-06-12T16:46:30.860
@Dave: Can you clarify whether you're sending from mysite.com or to mysite.com? Is the domain using GSuite Mail? Asking because your SPF record seems to do the opposite of what you're apparently trying to do... – user1686 – 2019-06-12T16:47:40.260
I'm sending from the hostname mysite.vs.mythic-beasts.com – Dave Hodgkinson – 2019-06-12T18:25:50.857
The bounce message links to (https://support.google.com/mail/?p=IPv6AuthError) which appears to be in Greek.
– Dave Hodgkinson – 2019-06-12T18:26:46.083I tried (https://support.google.com/a/answer/33786) this page, linked to from the bounce message. No dice. I now have a TXT record of:
mysite.com. 300 IN TXT "v=spf1 include:_spf.google.com ~all"
@grawity sending from my vps to gmail. – Dave Hodgkinson – 2019-06-12T18:38:33.243
What "From:" address are you using in WordPress mail settings? Do you have any "relay/smarthost" SMTP server configured in sendmail on the VPS? (Does your domain use GSuite or not? You still haven't answered that one.) – user1686 – 2019-06-12T18:42:16.620
@grawity: From: is from=root@mysite.vs.mythic-beasts.com. I've not touched the Sendmail configs at all. I'm only trying to send to Gmail. I don't use it myself.
– Dave Hodgkinson – 2019-06-12T18:51:01.830