Voicemail is not sent to email

Please check if e-mail address is correct in "Email:" field in user Device settings.

Also make sure that mails are not in a Spam folder.

Make sure Postfix service is not stopped and starts with reboot:

[root@mail3 log]# chkconfig postfix --list
postfix         0:off   1:off   2:on    3:off   4:on    5:on    6:off
(in this example configuration is broken)

Check /var/log/maillog for more clues.

Example

Dec 12 20:42:51 localhost postfix/smtp[28599]: connect to alt3.gmail-smtp-in.l.google.com[209.85.225.26]: Connection timed out (port 25)

Message shows that mail server cannot be connected.

Voicemail is not sent to Google mail (Gmail) due to IPv6

If you see such errors:

550-5.7.1 [2a01:4f8:160:726d::2] Our system has detected that this message does
550-5.7.1 not meet IPv6 sending guidelines regarding PTR records and
550-5.7.1 authentication. Please review
550-5.7.1  https://support.google.com/mail/?p=IPv6AuthError for more information
550 5.7.1 . e138si7186453wmf.124 - gsmtp

You can make tcpdump on port 25 to make sure that IPv6 is used:

tcpdump port 25

If IPv6 is used, then output should be similar to this:

12:54:36.268451 IP6 CentOS-65-64-minimal.44712 > 2a00:1450:4013:c02::1b.smtp: Flags [.], ack 1, win 113, options [nop,nop,TS val 2049592501 ecr 2609461210], length 0

To fix this, please edit file:

/etc/postfix/main.cf

Change:

inet_protocols = all

To:

inet_protocols = ipv4

And restart Postfix:

/sbin/service postfix restart

Voicemail is not sent to Google mail (Gmail) due to SPF or DKIM

Error:

Oct 11 10:33:47 sip-jhb1 postfix/smtp[1607079]: 83165FCC4D9: to=<some.email.to@gmail.com>, relay=gmail-smtp-in.l.google.com[173.194.76.26]:25, delay=1.8, delays=0.05/0/1.2/0.62, dsn=5.7.26, status=bounced (host gmail-smtp-in.l.google.com[173.194.76.26] said: 550-5.7.26 Your email has been blocked because the sender is unauthenticated. 550-5.7.26 Gmail requires all senders to authenticate with either SPF or DKIM. 550-5.7.26  550-5.7.26  Authentication results: 550-5.7.26  DKIM = did not pass 550-5.7.26  SPF [some_hostname.localdomain] with ip: [XXX.XXX.XXX.XXX] = did not pass 550-5.7.26  550-5.7.26  For instructions on setting up authentication, go to 550 5.7.26  https://support.google.com/mail/answer/81126#authentication 5b1f17b1804b1-430ccf1f0d6si29034085e9.1 - gsmtp (in reply to end of DATA command))

Solution:

Make sure the hostname you are sending emails from has the SPF Record.
The SPF Record Check: https://mxtoolbox.com/spf.aspx

Set the hostname to the From header according to this manual.

If the above solution does not work, try the one below.
In the file:

/etc/postfix/main.cf

Add:

sender_canonical_maps = regexp:/etc/postfix/sender_canonical

Then create a file:

/etc/postfix/sender_canonical

Add there:

/^root@some_hostname\.localdomain$/    no-reply@some_hostname.com
/^root@some_hostname$/                 no-reply@some_hostname.com

Execute commands:

postmap /etc/postfix/sender_canonical
systemctl restart postfix

To revert this configuration remove:

sender_canonical_maps = regexp:/etc/postfix/sender_canonical

From the file:

/etc/postfix/main.cf

Execute command:

systemctl restart postfix 

See also

• Voicemail does not work