Temporary server error please try again later attr5

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Hi,

I’m not able to send email to outlook servers, since a few days, due to me getting the following error «451 4.4.4 Temporary server error. Please try again later ATTR5»

A few examples:

Nov 18 10:37:50 mx01 postfix/smtp[29000]: 5303B20FD1: host baptistasegely-hu.mail.protection.outlook.com[213.199.154.202] said: 451 4.4.4 Temporary server error. Please try again later ATTR5 (in reply to MAIL FROM command)
Nov 18 10:38:06 mx01 postfix/smtp[29000]: 5303B20FD1: to=<…@baptistasegely.hu>, relay=baptistasegely-hu.mail.protection.outlook.com[213.199.154.234]:25, delay=17, delays=0.12/0/17/0.25, dsn=4.4.4, status=deferred (host baptistasegely-hu.mail.protection.outlook.com[213.199.154.234]
said: 451 4.4.4 Temporary server error. Please try again later ATTR5 (in reply to MAIL FROM command))

Nov 18 15:20:17 mx01 postfix/smtp[28360]: B6CB92105D: host tofhungary-hu.mail.protection.outlook.com[213.199.154.170] said: 451 4.4.4 Temporary server error. Please try again later ATTR5 (in reply to MAIL FROM command)
Nov 18 15:20:33 mx01 postfix/smtp[28360]: B6CB92105D: to=<…@tofhungary.hu>, relay=tofhungary-hu.mail.protection.outlook.com[213.199.154.234]:25, delay=8855, delays=8838/0/16/0.25, dsn=4.4.4, status=deferred (host tofhungary-hu.mail.protection.outlook.com[213.199.154.234]
said: 451 4.4.4 Temporary server error. Please try again later ATTR5 (in reply to MAIL FROM command))

Can anybody helps me solve this issue?

Answers

Thank you. Could you tell me how can I create a ticket? I have found the site (support.microsoft.com) where I can submit incident, but it is premium service, so I have to pay for it.

Is it the only way, or is there any other option to submit / create a ticket to microsoft?

I would have your clients open them, otherwise you will have to go through the paid support.

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  Saturday, November 19, 2016 3:06 PM

Hello,

We have a problem about sending email to Office 365 — outlook.com users. You can see the sample error code below. I have contacted with Office 365 and our ip is not blacklisted on their side. What can be the cause and the solution?

Thank you.

Code:

2016-11-21 13:15:23 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1c8lca-0007Th-6S
2016-11-21 15:29:13 cwd=/usr/local/cpanel/whostmgr/docroot 4 args: exim -v -M 1c8lca-0007Th-6S
+++ 1c8lca-0007Th-6S has not completed +++
2016-11-21 13:15:23 1c8lca-0007Th-6S <= [email protected] H=(LAPTxxxx) [78.188.55.65]:49947 P=esmtpa A=dovecot_login:eek:[email protected] S=2045869 [email protected] T="FW: Yakamoz Oguz l- new orders 4102 4103 4104 DELIVERY" for [email protected] [email protected]
2016-11-21 13:15:23 1c8lca-0007Th-6S SMTP connection outbound 1479723323 1c8lca-0007Th-6S domainnamexxxx.com.tr [email protected]
2016-11-21 13:15:23 1c8lca-0007Th-6S SMTP connection outbound 1479723323 1c8lca-0007Th-6S domainnamexxxx.com.tr [email protected]
2016-11-21 13:15:33 1c8lca-0007Th-6S SMTP error from remote mail server after MAIL FROM: SIZE=2077489: 451 4.4.4 Temporary server error. Please try again later ATTR5
2016-11-21 13:15:34 1c8lca-0007Th-6S SMTP error from remote mail server after MAIL FROM: SIZE=2077489: 451 4.4.4 Temporary server error. Please try again later ATTR5
2016-11-21 13:15:44 1c8lca-0007Th-6S == [email protected] R=dkim_lookuphost T=dkim_remote_smtp defer (-45) H=cumlaudy-XXXXX.mail.eo.outlook.com [94.245.120.74]: SMTP error from remote mail server after MAIL FROM: SIZE=2077489: 451 4.4.4 Temporary server error. Please try again later ATTR5
2016-11-21 13:15:44 1c8lca-0007Th-6S == [email protected] R=dkim_lookuphost T=dkim_remote_smtp defer (-45) H=gsxxxx.com.mail.protection.outlook.com [213.199.154.106]: SMTP error from remote mail server after MAIL FROM: SIZE=2077489: 451 4.4.4 Temporary server error. Please try again later ATTR5
2016-11-21 13:50:06 1c8lca-0007Th-6S SMTP error from remote mail server after MAIL FROM: SIZE=2077489: 451 4.4.4 Temporary server error. Please try again later ATTR5
2016-11-21 13:50:06 1c8lca-0007Th-6S SMTP error from remote mail server after MAIL FROM: SIZE=2077489: 451 4.4.4 Temporary server error. Please try again later ATTR5
2016-11-21 13:50:16 1c8lca-0007Th-6S == [email protected] R=dkim_lookuphost T=dkim_remote_smtp defer (-45) H=cumlaudy-XXXXX.mail.eo.outlook.com [213.199.154.138]: SMTP error from remote mail server after MAIL FROM: SIZE=2077489: 451 4.4.4 Temporary server error. Please try again later ATTR5
2016-11-21 13:50:16 1c8lca-0007Th-6S == [email protected] R=dkim_lookuphost T=dkim_remote_smtp defer (-45) H=gsxxxx.com.mail.protection.outlook.com [213.199.154.106]: SMTP error from remote mail server after MAIL FROM: SIZE=2077489: 451 4.4.4 Temporary server error. Please try again later ATTR5
2016-11-21 14:42:50 1c8lca-0007Th-6S SMTP error from remote mail server after MAIL FROM: SIZE=2077489: 451 4.4.4 Temporary server error. Please try again later ATTR5
2016-11-21 14:42:50 1c8lca-0007Th-6S SMTP error from remote mail server after MAIL FROM: SIZE=2077489: 451 4.4.4 Temporary server error. Please try again later ATTR5
2016-11-21 14:43:00 1c8lca-0007Th-6S == [email protected] R=dkim_lookuphost T=dkim_remote_smtp defer (-45) H=gsxxxx.com.mail.protection.outlook.com [213.199.154.106]: SMTP error from remote mail server after MAIL FROM: SIZE=2077489: 451 4.4.4 Temporary server error. Please try again later ATTR5
2016-11-21 14:43:03 1c8lca-0007Th-6S H=cumlaudy-XXXXX.mail.eo.outlook.com [213.199.154.138] Connection refused

Last edited by a moderator: Jul 30, 2019

rpvw

Well-Known Member

Looks like you may not be the only one

You can search for » Temporary server error. Please try again later ATTR5 » in a search engine and you will get links like this one 451 4.4.4 Temporary server error. Please try again later ATTR5

An older thread from MS suggested it was something to do with their licensing, and yet other blamed firewalls. Perhaps you need to do some further checks.

Last edited: Nov 22, 2016

Also having this issue, as are many people. It seems to be a problem with Outlook 365’s security certificates failing Postfix’s certificate verification.

I suppose we could turn this feature off somehow — does anyone from cPanel know how we might go about that?

As another alternative for anyone having the same issue, I have temporarily set up an email relay, until this issue is fixed.

My new problem though, is that some of the IPs our SMTP relay provider uses have been blacklisted by some spam lists (because of spam by their other customers).

I’m not familiar enough with Exim configuration to know how to do the following (and can’t find anything in Google), but it feels like it should be possible. If anyone has any idea how to configure cPanel so that it sends email through our local mail server by default, and uses the relay for emails that have received the 451 error, that would be the perfect solution. Does anyone know how to set that up, or know an email technician that may be able to help?

Thanks!

Anyone have any updates on this? I’m going on four days with this problem and no one at Microsoft gives a damn (they won’t even reply) because for the majority of users it seems to be fixed. Not me though!

Is it possible to set up an SMTP relay for ONLY the emails that go to Office 365 servers? At least I can get them out of the queue for a while.

Or some way of testing and verifying if it’s the Postfix certificate verification that’s causing the issue? Thanks.

No updates from anyone — rather frustrating! Emails are still sitting in our mail queue, manually clearing them out through the relay several times each day, but we can’t keep this up forever.

Would appreciate hearing back from someone at cPanel and whether there’s a fix we can implement on the cPanel end for this? I know it’s Microsoft’s fault, but it seems to be a widespread problem for cPanel users.

I probably need to set up a relay as well then because I’ve had emails queue for almost a week now.
It does appear to be with Microsoft. I’m able to reach some office office users, but none on a certain IP range (which is what everyone in my country uses). Those on that Ip range don’t resolve from pinging either.

However, according to Office 365 support the emails aren’t reaching their server at all. So the ND message isn’t coming from Microsoft, it’s coming from cpanel. Any chance of cpanel support giving some info on what this error really means?

This issue seems to have finally been fixed. My email queue has been clear for the last hour. Hopefully it’s fine for everyone else now too

Same here, as of about 2 hours ago it started moving.

Hello,

I’m happy to see the issue is now addressed. This does not appear related to any Exim configuration values, and instead looks to have related to an issue with Microsoft’s servers.

Thank you.

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we have a problem for some hours now and no incoming emails.

Setup: Our MX records points to our own pre-mailserver, which delivers all accepted mails directly to the xxxxx.mail.protection.outlook.com server. xxxxx .mail.protection.outlook.com is the address which, according to office365 advice, should be the MX record target. (xxxxx is just anonymized).

Until tonight, it all worked great, but now for several hours, xxxxx.mail.protection.outlook.com rejects all the emails from our incoming email relay.

Example of the mail queue log:

3C18E303DF 26149 Tue Nov 22 08:48:16 sender@example.org
(host xxxxx.mail.protection.outlook.com[xxx.xxx.xxx.xxx] said: 451 4.4.4 Temporary server error. Please try again later ATTR5 (in reply to MAIL FROM command))
recipient@example.org

Any ideas what we could do?

we have a problem for some hours now and no incoming emails.

Until tonight, it all worked great, but now for several hours, xxxxx.mail.protection.outlook.com rejects all the emails from our incoming email relay.

Example of the mail queue log:

Any ideas what we could do?

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Dear Andy, thank you for your answer.

I have opened a case within Office 365. They called me back and said, multiple customers had reported similar issues.

While the problem was not solved, I tried out some more things:

Mails sent from Gmail are being received, if I ensure that gmail sends emails via the direct route to the office365 mx server (I did that via a conditional DNS server change).
At the same time, emails from our mail relay were rejected (same error message as above). This indicated that the problem was specific to our servers, most presumably the ip addresses.
I searched for my relay settings. We had a very similar problem some months ago. As a result, I had to add the IP address of our relay mailserver into a whiteliste in office 365. Unfortunately, I cannot find that whitelist setting in office365 at all — either the functionality to whitelist external smtp servers has been taken out of Office 365, or I am too stupid to re-find it.
I remember that the advice of the «do I need a connector» assistant was no a year ago. I would classify our setup as «partner organisation» setup — and the connector advisor today still said, it is optional to create one.

However, I added the connector, as an internal one, configuring the subnet of our relay servers as «the organisation’s email server».

4 minutes later, the problem was solved.

From my perspective as an IT professional, I am not satisfied with the Microsoft style of handling things. I would expect:

SMTP error messages which help finding a problem. Obviously, our IP address had been blocked, but the error message sent by the microsoft server indicated an internal problem at the Microsoft server.
A possibility to find out if and why our mailserver has been blocked by MS systems. Just for the record: we do not send any spam, and especially this relay server only relays mail from the internet to the customer — so no reason to block it (we are talking about peanuts: an average of 500 mails per day).
a support which is able to handle this kind of absolutely basic IT stuff. SMTP exists for 30 years now, the problem is clearly tracked down to «mail is rejected by receiving smtp server» within 30 seconds, but there seems to be no way to report it. I have to take all the way from Level 1 support (select «my email does not arrive»), and the support guys never heard of SMTP at all. Hard to explain the problem, in this case.
Information to the admins, before global mail filters are changed. As everything worked well for a year or so, and as we did not logon to Office365 nor changed our mail configuration, and as the problem occured to multiple customers independent from ours, it seems to me that something significant changed on the MS side. Without notice.

The worst thing is, I do not know when the next change will make my connector configuration disappear and block the emails again. How can I prevent this from happening?