4.7.0 Timeout waiting for client input - Invalid server response

Support General Configuration
1

I have just set up a new Axigen server to replace my iReadMail server. DNS is set up with A, MX, DMARC, DKIM, and SPF records. Reverse DNS is also setup. I am running the mail server on a VPS with an IP address and domain that are not blacklisted.

When I send mail to my old server it works great. But when I send mail to Gmail and Outlook the mail is not delivered.

Outlook.com error
4.7.0 Timeout waiting for client input

gMail Error
Invalid server response

SMTP out log is attached.

smtp-out (1).log (9.5 KB)

Thank you.

2

Hello Elliott,

Please increase the log level to Protocol Communication level for SMTP Sending service and share the SMTP-OUT log lines related to a fresh new message sent to a Gmail recipient.

Also please let us know the Axigen version you are currently using.

HTH,
Ioan

3

Hello Indreias,

Thank you for the response. I am using a new install of Axigen 10.4.0 on Ubuntu 20.04 server.

Below is the SMTP sending log after the log level was increased.

2022-12-12 09:12:57 -0500 08 mail SMTP-OUT:000001EB: Relay mail 108CBD: connecting to 74.125.197.27:25
2022-12-12 09:12:57 -0500 08 mail SMTP-OUT:000001EB: Relay mail 108CBD: connected to 74.125.197.27:25
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: << 220 SMTP ESMTP Service Ready
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: >> EHLO mail..
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: << 250-Hello mail..
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: << 250-8BITMIME
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: << 250-CHUNKING
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: << 250-ENHANCEDSTATUSCODES
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: << 250-PIPELINING
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: << 250-SIZE 157286400
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: << 250-SMTPUTF8
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: << 250 STARTTLS
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: >> STARTTLS
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: << 220 2.0.0 Ready to start TLS
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: >> SSL: client hello, remote 74.125.197.27:25, version TLS 1.3 (0304)
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: >> SSL: client hello, remote 74.125.197.27:25, session id 95b571ee56c3ea7fcfe8a0c69cf7aaec23c41d53b930b9f096e19c3444d85d25
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: >> SSL: client hello, remote 74.125.197.27:25, 31 cipher suites: 130213031301c02cc030009fcca9cca8ccaac02bc02f009ec024c028006bc023c0270067c00ac0140039c009c0130033009d009c003d003c0035002f00ff
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: << SSL: server hello, remote 74.125.197.27:25, version TLS 1.3 (0304)
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: << SSL: server hello, remote 74.125.197.27:25, session id 95b571ee56c3ea7fcfe8a0c69cf7aaec23c41d53b930b9f096e19c3444d85d25
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: << SSL: server hello, remote 74.125.197.27:25, cipher suite 1302
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: << SSL: server hello, remote 74.125.197.27:25, version TLS 1.3 (0304)
2022-12-12 09:12:57 -0500 16 mail SMTP-OUT:000001EB: >> EHLO mail..
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: << 250-Hello mail..
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: << 250-8BITMIME
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: << 250-CHUNKING
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: << 250-ENHANCEDSTATUSCODES
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: << 250-PIPELINING
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: << 250-SIZE 157286400
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: << 250 SMTPUTF8
2022-12-12 09:12:58 -0500 08 mail SMTP-OUT:000001EB: Start sending mail 108CBD
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: >> MAIL FROM:<es@*****.> SIZE=2444
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: >> RCPT TO:elliott.stoddard@gmail.com
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: >> NOOP
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: << 250 2.1.0 OK cw4-20020a056a00450400b0056282b4a984si9470044pfb.126 - gsmtp
2022-12-12 09:12:58 -0500 08 mail SMTP-OUT:000001EB: Release mail 108CBD
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: << 250 2.1.5 OK cw4-20020a056a00450400b0056282b4a984si9470044pfb.126 - gsmtp
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: << 250 2.0.0 OK cw4-20020a056a00450400b0056282b4a984si9470044pfb.126 - gsmtp
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: >> BDAT 2444 LAST
2022-12-12 09:12:58 -0500 16 mail SMTP-OUT:000001EB: >> Send last chunk of size 2444
2022-12-12 09:12:58 -0500 08 mail SMTP-OUT:000001EB: Release mail 108CBD

4

Hello Elliott,

I don’t see anything abnormal other than the missing the confirmation from the remote Gmail SMTP server that the message was accepted / rejected.

Have you any network device (like router / firewall) that may interfere on the SMTP-OUT traffic between Axigen server and remote Gmail server?

HTH,
Ioan

5

Thank you Indreias,

This server is running in a datacenter in Seattle. I will submit a ticket asking tech support if there is anything blocking SMTP out.

6

I installed a plain Ubuntu mail server VM on that IP and it sent mail to gMail and Outlook.live.com without a problem. Even though the new DKIM signature in DNS had not propagated yet.

The Axigen mail server that is not working was installed following the online instructions and used this file, mail-server/download/deb/latest/axigen_10.4.0-1_amd64.deb on the Axigen server.

7

Hello Elliott,

It is good to know that your tests were OK when executed with another mail server.

My suggestion is to install with 10.4.1 (released today) and have another try.

Basically we like to see the a full SMTP-OUT session (log level set to Protocol Communication) for a failed delivery tentative.

This means that the SMTP-OUT session have to contain lines like:

SMTP-OUT:%s: Relay mail %s: connecting to %s:25
SMTP-OUT:%s: Relay mail %s: connected to %s:25
...
SMTP-OUT:%s: Disconnected from %s

I have to admit that I didn’t saw a similar report till now and would like to assist you overpass this issue.

BR,
Ioan

8

Indreias,

Thank you for your help. I grabbed the right end of the log file this time. I apologize for the error. Please find it attached.

smtp-out(1).log (20.5 KB)

The Axigen servers seem to be overloaded with people downloading the update. I will try again later.

9

Hello Elliott,

So all SMTP-OUT sessions that are trying to deliver a message to a Gmail recipient are disconnected after 5 minutes:

2022-12-13 15:03:44 -0500 16 mail SMTP-OUT:00000001: >> Send last chunk of size 2444
2022-12-13 15:03:44 -0500 08 mail SMTP-OUT:00000001: Release mail 108CBD
...
2022-12-13 15:08:44 -0500 08 mail SMTP-OUT:00000001: Disconnected from 74.125.195.26

For testing purposes, could you please try to send a message from WebMail? Or those messages were already sent from WebMail?

Also, could you please send me (via direct message) one or two messages blocked into the queue (if not already removed, you may download them via WebAdmin > Queue > View Queue)?

I have no other ideas on this topic so let’s explorer any possible options we have at hand.

HTH,
Ioan

10

Thank you for looking at this problem. The log is for emails sent using the webmail interface. I will send you a message with the email.

11

I looked at your profile and I do not see how to contact you. Please feel free to send me an email at eds@ {my username on the board} dot com. That address uses my email server I want to replace.

12

I have installed the Axigen server v10.4.0 twice on two clean Ubuntu 20.04 VMS. Both times it has had this problem. And even upgrading one to v10.4.1 did not fix this problem. The only to common items was my Axigen license and the server version.