无法使用 API 将电子邮件发送到 mailgun 的列表

Question

I'm working on my own class that uses php to deliver all mailgun's operations through the API.

1st scenario

I use my class to create a list + add 2 members with real emails. My control panel shows these items created. When I send my message I inspect my logs from php + curl and I can see success but the message never reaches the list members!

2nd scenario

On the other hand when a list member sends a mail to list then all list members receive it as I was expected cause I made the list open to members.

On the 1st scenario

I inspect the logs at Mailgun's panel and I can see accepted.

I suspected sth might be wrong in my domain record settings but Mailgun has verified my domain from godaddy.

Another possibility might be that my account is flex and I should add a debit card that's why they deny to deliver my message.

Anyway I tested in both the sandbox domain and a real one.

My DNS records at godaddy implement the following:

MX for domain.com because I forward mails to gmail
MX for mail.domain.com to make mailgun accept messages to my list
CNAME for both domains as proposed
A for both domains
TXT for both domains as proposed

Any idea what might be wrong?

How I send the message

I implemented a method that sends a request at API endpoint https://api.eu.mailgun.net/v3/DOMAIN/messages where DOMAIN is replaced from the sandbox or real domain.

I use this method for

• 1 recipient --> passes

• a batch of recipients --> passes

• a mail list --> fails

The documentation says nothing for different endpoints.

Answer 1

That's a strange API indeed!

Mailing lists guidelines:

1. your list has access level readonly then you don't have to add this list in your recipients

2. your list has access level members then ADD the list to the recipients

3. your list has access level everyone then you don't have to add this list in your recipients.

Now, send an authenticated message with the API - this is called administrator at the docs(?)

Case (2) seems logical as any address which is not a member can't - and shouldn't - send a message to the list even the API itself !

But wait, this is NOT the end of the story for case (2): when you send the message to the list you should define from value that same list otherwise your message is accepted but never delivered!

Hopefully my code handles all the above cases automatically although I had to make a sendToList method that calls eventually the generic send() !