imap_open: Can't open stream

Question

I'm trying to use imap_open() for my FatCow email account. Here's my code:

$mbox = imap_open("{imap.fatcow.com:143}", "account@domain.com", "password");

Here's what I receive:

Warning: imap_open() [function.imap-open]: Couldn't open stream {imap.fatcow.com:143} in /home/alfatcom/public_html/test.php on line 2

Maybe the reason is that FatCow uses STARTTLS? Anyway, what am I doing wrong?

@Sergey, I know about this article, I'm actually basing my code on Example #2 from it. — Sergey, May 28 '12 at 12:37
I've always tried to open "gmail / google apps email" with "ssl" and it works. — Arfeen, May 28 '12 at 12:38
try this as last resort: {imap.fatcow.com:143/imap/tls/novalidate-cert}INBOX — , May 28 '12 at 12:53
@vlzvl, unfortunately, it didn't work, even warning is still "Couldn't open stream ..." — Sergey, May 28 '12 at 12:56

score 0 · Answer 1 · answered Jan 19 '15 at 10:14

In my case it was {domain:110/pop3/novalidate-cert}INBOX that helped me in fixing both the CLOSED IMAP connection broken (server response) and Certificate failure for domain.

Confirm your ports and also whether you have ssl enabled using

openssl s_client -crlf -connect your-domain-name:port-number

imap_open: Can't open stream

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