Can't receive mail

I'm not certain which hardware you have, but a few resources to check out:

http://en.wikipedia.org/wiki/PathMTUdiscovery

This will give you an overview of path MTU discovery....to understand better what happens when it isn't set properly (and some good diagnostic information for general use) can be found here:

http://www.netopia.com/support/hardware/technotes/NIR_067.html

Which you will see is suspiciously similar to the behavior you describe. I had a router go South on me, and the symptom was that short e-mails from .Mac would fly through, but anything with an attachment (an iCal event invite is a good one to test against) or something with a lot of HTML would fail.

Hope that helps. Please let us know how that works out.

thanks for the info..... it has to be something in the "airport express" I bypassed the airport and it all works flawlessly. I will have to do some research on the airport and its settings (not familiar).

thanks for the help you are all great

** I've started a new thread for this query**

Since upgrading to 10.6 Server, I'm also unable to receive mail for my virtual domains. Message is the same as above

"Sep 2 21:57:36 server postfix/smtpd(1647): NOQUEUE: reject: RCPT from mail.example.com(123.123.123.123): 450 4.7.1 <me@mydomain.com>: Recipient address rejected: Service is unavailable; from=<you@yourdomain.com> to=<me@mydomain.com> proto=ESMTP helo=<mail.example.com>"

Any help would be appreciated, Cheers

Message was edited by: lemoncheese

Just for completeness (and knowing that this is in response to Matt's post, not the original poster's, but in order to allow future searchers to find this info), I would like to point out that I had exactly the same message as Matt but greylisting was not enabled on my system.

Instead it turned out that the problem was from a completely different cause. I had moved the mail folder (imap/dovecat/mail) to an external volume, which was not mounting correctly at startup (because I had moved swupd there, too, and re-pointed Software Update, which barfs if you do that). Because the mail folder volume didn't mount, incoming mail was rejected with the "Recipient address rejected: Service is unavailable" message.

@Robb Allan:
Could you maybe post the exact error log entry you received? While similar, it should look different to the one caused by greylisting.

"postfix/smtpd\[pid\]: NOQUEUE: reject: RCPT from sender \[ sender-IP \]: 450 4.7.1 < localuser @helical.com>: Recipient address rejected: Service is unavailable; from=< sender-email-address > to=< localuser @helical.com> proto=ESMTP helo=< sender-email-address >"

Does disabling greylisting affect spam filtering in any way?

This did seem to help my delay issues with delivery but emails with attachments are still delayed.

Thanks to everyone for the help. I must say I'm surprised I'm having so many problems with a brand new Snow Leopard server, especially mail.

Your issue, I suspect, is not greylisting and is something more at a network level, like an MTU black hole.

The behavior you're describing is one of the exact symptoms.

Hi, I think I'm having a similar problem but possibly a completely new one...

First my problem was I couldn't receive mail. I then re-entered the mail account and it seems to be keeping up to date. However I'm now having problems with my iPhone. I have tried recreating the mail account on my phone with no luck. The server is up to date but the only way I can find any mail after the 16th Oct is to do a search for it.

Anyone have any ideas?

this seems to be my problem as well but so far it is still doing it.
I'll shut off greylisting in the master.cf file and see if that helps. I never had
any problems under tiger. It worked like it should for years.
The server ui still can't shutoff the greylisting.

how do I edit this file? I understand how to open terminal and enter the first line, but from there, how do I actually edit this value? Do I paste the whole thing in?

+sudo pico /etc/postfix/main.cf+

from

+smtpd recipientrestrictions = permit saslauthenticated permit_mynetworks reje ct unauthdestination check policyservice unix:private/policy permit+

to

+smtpd recipientrestrictions = permit saslauthenticated permit_mynetworks reje ct unauthdestination permit+

Did you ever solve your issue? I am having the same issue and can't seem to find a solution. Anyone?

Thanks in advance

@ Robb Allan

First, thanks for sharing your observations since otherwise I would have been searching for a greylist related solution.
I encounter the exact same problem: "Recipient address rejected: Service is unavailable" and it seems to be related to the fact, that I store my Mail data on the second hard drive of a new mac mini server.

If I set the path to where the Mail-data is stored /Volumes/Macintosh HD2/ServiceData/Mail and save the change, emails are delivered once. But unfortunately the next email doesn't make it trough.

I wonder if you could come up with a solid solution? Did you solve it yet?

Best regards,
Andrash



edit: is there a way to move the /ServiceData/Mail to the main hard drive which is Server HD?

Message was edited by: Andreas Franz.

edit 2: The problem seems to be solved if I do not set the path to "/Volumes/Macintosh HD2/ServiceData/Mail" but instead to: “/Volumes/Macintosh HD2“. Obviously this way all the messages are getting delivered.... great!

unfortunately, max os x server seems to forget the mail path after the next restart
😟