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

[Amey Abhyankar]

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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