1 (edited by neoark 2019-12-19 22:08:12)

Topic: Unable to receive email from gmail

==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.0
- Deployed with iRedMail Easy or the downloadable installer? No
- Linux/BSD distribution name and version: Ubuntu 18.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  MariaDB
- Web server (Apache or Nginx): Ngnix
- Manage mail accounts with iRedAdmin-Pro? Yes
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

Please see the error log below:

Dec 18 19:47:20 mail postfix/dnsblog[186247]: warning: dnsblog_query: lookup error for DNS query 2.4.b.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.b.barracudacentral.org: Host or domain name not found. Name service error for name=2.4.b.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.b.barracudacentral.org type=A: Host not found, try again
Dec 18 19:47:20 mail postfix/dnsblog[186247]: warning: dnsblog_query: lookup error for DNS query 2.4.b.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.zen.spamhaus.org: Host or domain name not found. Name service error for name=2.4.b.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.zen.spamhaus.org type=A: Host not found, try again
Dec 18 19:47:26 mail postfix/postscreen[186246]: PASS OLD [2607:f8b0:4864:20::b42]:41641
Dec 18 19:47:26 mail postfix/smtpd[186258]: connect from unknown[2607:f8b0:4864:20::b42]
Dec 18 19:47:27 mail postfix/smtpd[186258]: Anonymous TLS connection established from unknown[2607:f8b0:4864:20::b42]: TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits)
Dec 18 19:47:27 mail postfix/smtpd[186258]: NOQUEUE: reject: RCPT from unknown[2607:f8b0:4864:20::b42]: 450 4.7.1 <mail-yb1-xb42.google.com>: Helo command rejected: Host not found; from=<user@gmail.com> to=<postmaster@mail.info> proto=ESMTP helo=<mail-yb1-xb42.google.com>
Dec 18 19:47:28 mail postfix/smtpd[186258]: disconnect from unknown[2607:f8b0:4864:20::b42] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 quit=1 commands=5/7
Dec 18 19:50:48 mail postfix/anvil[186260]: statistics: max connection rate 1/60s for (smtpd:2607:f8b0:4864:20::b42) at Dec 18 19:47:26
Dec 18 19:50:48 mail postfix/anvil[186260]: statistics: max connection count 1 for (smtpd:2607:f8b0:4864:20::b42) at Dec 18 19:47:26
Dec 18 19:50:48 mail postfix/anvil[186260]: statistics: max cache size 1 at Dec 18 19:47:26
Dec 18 20:28:36 mail postfix/postscreen[190478]: CONNECT from [91.196.91.86]:63283 to [172.105.57.85]:25

2

Re: Unable to receive email from gmail

neoark wrote:

Dec 18 19:47:27 mail postfix/smtpd[186258]: NOQUEUE: reject: RCPT from unknown[2607:f8b0:4864:20::b42]: 450 4.7.1 <mail-yb1-xb42.google.com>: Helo command rejected: Host not found; from=<user@gmail.com> to=<postmaster@mail.info> proto=ESMTP helo=<mail-yb1-xb42.google.com>

Did you send this testing email from Gmail?
I expect all Gmail server hostnames and HELO hostnames are resolvable by DNS query.

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