Strange indeed, I just tried to send an email to an .icloud address and it work like a charm. Tailing /var/log/mail.log gave me the same result as yours.
You can do a checkup on your email address using the allaboutspam.com service.
It should give you hints about what may be wrong with your box.
@SaliVan, did you check your spam folder on icloud?
Check that the system status page at /admin doesn’t show any problems. Try @buraitopengin link. If neither of those reveals a problem, post again and we’ll keep looking.
I’ll send a message to “jt@occams.info” from my email "b...v@me.com" could answer it with your MailBox, I want to check if the letter reach from other MailBox.
I’ve been experiencing the same issue when sending to outlook.com email addresses.
I don’t get an undeliverable message and the email doesn’t hit the outloook.com spam folder, it just never arrives.
I’ve also tried sending the mail from multiple email addresses and multiple domains with the same result.
As soon as you add the email address to the “Safe Sender” list in the outlook.com account, all of a sudden, everything goes through fine to the inbox.
I’ve tried sending mail from other services to the same outlook.com mail account and they go through ok.
I can only assume there’s something about the setup of the mail-in-a-box server that outlook.com (and by the sounds of it, other mail services) doesn’t like.
I’m using Digital Ocean.
Whilst I agree it could be the IP, I don’t think it’s the domain or the ISP. As I said, I tried sending mail from other accounts that are not hosted on the MIAB server but using the same ISP and they got through fine, likewise, before I transferred the domain over to my MIAB server I never encountered the same problem.
I have also done a blacklist check using MXtoolbox and it shows up ok on all checked services.
I’m not saying there’s an inherent problem with the MIAB, because the majority of mail gets through without a problem, but there’s obviously something a small number of email providers don’t like about these emails, and I’d love to be able to get to the bottom of what it is, but I’m just not sure how else to do it.