[PLUG] Sendmail is unable to send emails to users in same domain

[Amey Abhyankar]

On Wed, 23 Dec 2020 at 14:25, Vishal Rao <vishalrao at gmail.com> wrote:

> So either you need smtp server port listening enabled on host abc.com or
> there is a firewall rule blocking it, I guess.
>

Issue got resolved after removing entry of abc.com from /etc/resolve.conf


>
> On Wed, 23 Dec 2020, 14:21 Amey Abhyankar, <sco1984 at gmail.com> wrote:
>
>> On Wed, 23 Dec 2020 at 12:50, Vishal Rao <vishalrao at gmail.com> wrote:
>> >
>> > Do you have mail server port open on abc.com itself and not some
>> subdomain like smtp.abc.com?
>>
>> If I try to telnet on port 25 to abc.com, I get a connection refused
>> message.[over private/internal IP range]
>>
>> >
>> > On Wed, 23 Dec 2020, 12:33 Amey Abhyankar, <sco1984 at gmail.com> wrote:
>> >>
>> >> Hello,
>> >>
>> >> I am trying to configure sendmail on gitlab 13.x CE [on-prem
>> >> server/CentOS 7] to send emails to the LDAP based gitlab users.
>> >> [on-prem/traditional set-up]
>> >>
>> >> Sendmail is able to send email to any domains except its own domain.
>> >>
>> >> In logs, I am getting a message saying that the connection is refused
>> >> by domain abc.com & the private IP of Windows based DNS server.
>> >> The mailing solution for abc.com is taken from Google.
>> >> We checked for any email in the queue from gitlab at gitlab.abc.com but
>> >> no email in blacklist or spam section.
>> >>
>> >> mail sender is gitlab at gitlab.abc.com
>> >> Reply to is noreply at gitlab.abc.com
>> >>
>> >> I tried to add abc.com domain in access file as = Connect:abc.com
>> RELAY
>> >> Tried with more R&D but same issue.
>> >> Not helping.
>> >>
>> >> Any ideas how to fix the issue.
>> >> I did a lot of Google.
>> >> Those solutions did not work.
>> >>
>> >> Regards,
>> >> Amey.
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>> >
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