Jason Hendriks

I found multisite support in WordPress undocumented and difficult to test. I might take a stab again when I have more free time or I get volunteers to help develop.

Cheers
??

IMAP is a protocol for retrieving email from a mailbox, which Postman does not support.

Postman only delivers email, using the standard SMTP protocol.

Cheers!

@gallienus53 this is the MX of your domain:

;; ANSWER SECTION:
coinsandhistory.com.	10799	IN	MX	30 3bp-1.inbound30.luxsci.com.
coinsandhistory.com.	10799	IN	MX	10 3bp-1.inbound10.luxsci.com.
coinsandhistory.com.	10799	IN	MX	20 3bp-1.inbound20.luxsci.com.

This domain is clearly not a Google account. Yet you tried to go to Google and set up an OAuth 2.0 token for it. This is why Google told you, “Bad Request”.

Don’t try to override the wizard, it’s smarter than you when it comes to setting up mail servers.

This is your domain.

coinsandhistory.com. 10799 IN MX 30 3bp-1.inbound30.luxsci.com.

The reason Postman is a “non-working mail program” is that you tried to use it to send email managed by luxsci.com, which is not Gmail, through Gmail.

Please try again, but this time read the documentation or follow the instructions of the Wizard. It really is idiot proof. In most cases.

@gallienus53 I’m sorry you’re having trouble. I just don’t have the time to keep up with the hundreds of individual support requests.

I’ll try the Google API later tonight and let you know what I find.

Thanks for pinging. Let me take a look.

How is that happening?

Simply, the From: address in email is normally never authenticated. Anyone can set any From: address they like and hit send. (If you think about it, didn’t Postman ask you what the From: address you wanted to use was?) This is how phishing works. Some spammer sends an email from [email protected] and there’s nothing there to indicate that it isn’t actually from you.

how can spammers use my own domain name to send their emails?

Well, the domain in the From: address may have been your domain, but it’s not likely they used your own server to send it. Anyone can setup an SMTP server on the Internet to send mail. That’s the strength (and weakness) of SMTP. An SMTP server that allows connections from anywhere, to send mail to anywhere, is known as an open relay.

Is there a configuration I can change to stop spammers from using my domain to send emails?

Actually, there are two. One is known as DKIM and the other is known as SPF. If you tried to set up your postman to send email with my address, it would likely fail. Let’s take a look at the DNS configuration for my domain to understand why:

Jasons-Mac-Pro:Downloads jasonhendriks$ dig txt hendriks.ca

; <<>> DiG 9.8.3-P1 <<>> txt hendriks.ca
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24741
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;hendriks.ca.			IN	TXT

;; ANSWER SECTION:
hendriks.ca.		3599	IN	TXT	"v=spf1 include:_spf.google.com -all"

;; Query time: 48 msec
;; SERVER: 10.0.1.1#53(10.0.1.1)
;; WHEN: Fri Dec 30 00:42:47 2016
;; MSG SIZE  rcvd: 77

The output of the command dig txt shows that my domain, hendriks.ca, has a TXT record that indicates the only approved SMTP server is google.com. If any SMTP server on the Internet that obeys SPF (and that’s most of the big ones) receives an email with a From: address of hendriks.ca that didn’t originate from google.com, it should be deleted.

FYI, some mail services, like Gmail, will increase the spam score for emails that don’t arrive with an SPF tag. This is the number one cause for “vanishing email”.

Ask your email service provider about configuring your domain’s SPF TXT record. This guide may help: https://www.mail-tester.com/spf/

Cheers,
Jason

You appear to be using GoDaddy? They may be capping the maximum number of recipients per email. This is a GoDaddy issue, not Postman.

For such large numbers of recipients, you should be using a Transactional Mail Service, such as Mailchimp or SendGrid.

Cheers!
Jason

Lol. That’s a great question! I know I put a reset link on the main config screen somewhere. I’ll fire it up in the morning and let you know ??

… invalid as far as Postman is concerned. Unfortunately there’s no one place on the Internet where I can find a list of valid domains. It’s hardcoded in a library Postman uses.

Yes, they could be user-modified. Good idea!

Yes. I meant to disable email validation in the wizard if the domain is invalid, but I never got around to it. Maybe over Christmas vacation!

Oh, 587 seems fine. That’s odd. Perhaps try re-creating your Google OAuth 2 ID.

If it still doesn’t work, perhaps switch to the Gmail API on port 443?

• This reply was modified 8 years ago by Jason Hendriks.
• This reply was modified 8 years ago by Jason Hendriks.

Looks like the SSL3 cert was unable to be verified, hence the TLS failure.

Either the server certificates are out of date (unlikely), or the client certificates are (likely). Can you update the OpenSSL library on your WordPress server?

What’s the actual error message found in the Postman error log?

I just noticed that your Postman is actually configured for port 587.

In the Connectivity Test, do you get the warning on port 587 as well? Your post shows the warning on port 25 only.