Investigating Multi-Recipient Email Delivery Issues on Cloudron v8.2.4
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Dear Cloudron Team,
Today, I conducted a test by sending emails simultaneously to multiple addresses such as @gmail.com, @outlook.com, and others. However, when I sent the email via Cloudron’s system, only the first email was successfully received, while the rest did not receive the message.
I then attempted a second test using “reply to all,” but the result was the same—only the first email received the message, and the others did not.
My question is: Is there an error in my server configuration, or is there a bug in Cloudron version v8.2.4? I have tried disabling IPv6 and syncing again, but the result remains unchanged. I also attempted enabling both IPv6 and IPv4 simultaneously, yet the issue persists.
Could you please advise on what steps I should take to resolve this issue?
Thank you for your attention and assistance.
Regards -
Hi @IniBudi, do you use any external relay email service? Eg. Postmark or similar?
I ask you this to better understand your conf but also because last week I sent same email to two different @gmail.com accounts and one of recipient in CC it seems it didn't received email.
But I'm not sure if is similar to your case.
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I'd like to confirm that the problem was coming from my 3rd party email relay service. I just disabled it and using my own server without having problem at all.
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I'd like to confirm that the problem was coming from my 3rd party email relay service. I just disabled it and using my own server without having problem at all.
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@IniBudi Wich email relay are you using? I think this problem should be better addressed and understood to let have a fix...
This because we're used to use relay servers due to poor IP Vps's reputation...
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@p44 In the previous setup, I used mailketing SMTP server, after using the Built-in SMTP server. I can send emails to several email addresses simultaneously.
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J joseph marked this topic as a question on
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Dear Cloudron Team,
Today, I conducted a test by sending emails simultaneously to multiple addresses such as @gmail.com, @outlook.com, and others. However, when I sent the email via Cloudron’s system, only the first email was successfully received, while the rest did not receive the message.
I then attempted a second test using “reply to all,” but the result was the same—only the first email received the message, and the others did not.
My question is: Is there an error in my server configuration, or is there a bug in Cloudron version v8.2.4? I have tried disabling IPv6 and syncing again, but the result remains unchanged. I also attempted enabling both IPv6 and IPv4 simultaneously, yet the issue persists.
Could you please advise on what steps I should take to resolve this issue?
Thank you for your attention and assistance.
Regards@IniBudi said in Investigating Multi-Recipient Email Delivery Issues on Cloudron v8.2.4:
I then attempted a second test using “reply to all,” but the result was the same—only the first email received the message, and the others did not.
Have you checked the mail event log ? It should have an entry for each outbound email.
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@IniBudi said in Investigating Multi-Recipient Email Delivery Issues on Cloudron v8.2.4:
I then attempted a second test using “reply to all,” but the result was the same—only the first email received the message, and the others did not.
Have you checked the mail event log ? It should have an entry for each outbound email.
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J joseph has marked this topic as solved on
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