strange issue with sending emails - not received

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MudassarKhan
Posts: 7
Joined: Sat Aug 21, 2021 3:04 pm

strange issue with sending emails - not received

Post by MudassarKhan »

I am having issues with a mailbox on my server.

This particular inbox is able to send emails to other inboxes on my server without any problem.

However when i send to external email accounts the email is not received.
The major quirk here is if i send an email to the server inbox from a gmail account and reply from the server inbox, the email is received by gmail but it goes direct to the sent folder in gmail. It wont show in the inbox.
I don't understand what the issue could be here.
If Gmail is able to receive the reply why wont it put it in the inbox?
Why am i not able to receive the emails to any other provider?
https://t.me/pump_upp

MailEnable-Ian
Site Admin
Posts: 9738
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: strange issue with sending emails - not received

Post by MailEnable-Ian »

Hi,

There could many reasons for this. The first step would be to analyze the SMTP log files to gain a better understanding if there are problems when transmitting the message to the remote mail server your sending to. Are there any bounce messages sent back to the sender with failure details?
You want to also review the following article which is an article that helps troubleshoot sending to large providers such as Gmail, Hotmail etc.

https://www.mailenable.com/kb/content/article.asp?ID=ME020241
Regards,

Ian Margarone
MailEnable Support

MudassarKhan
Posts: 7
Joined: Sat Aug 21, 2021 3:04 pm

Re: strange issue with sending emails - not received

Post by MudassarKhan »

Thanks for the reply.
DKIM and SPF are valid, we were going in to spam mostly but that is not a problem as were are in direct communication with our customers and tell them to check their spam.
The strange thing that started yesterday was the emails not even going in to spam. They are not received externally at all. Unless I reply to an email received from gmail, then my outgoing email is successfully received by gmail. That is where I am confused. What could be the issue that blocks outgoing email except when i reply to an incoming email?

Code: Select all

08/23/21 05:57:58	SMTP-OU	A51A416496164CEE933CA2C37B54900B.MAI	1476	142.250.102.26	CONN		220 mx.google.com ESMTP x11si14193926edd.110 - gsmtp	0	54	info	test email
08/23/21 05:57:58	SMTP-OU	A51A416496164CEE933CA2C37B54900B.MAI	1476	142.250.102.26	EHLO	EHLO webmail.manytechsolutions.co.uk	250-mx.google.com at your service, [77.68.3.217]	38	167	info	test email
08/23/21 05:57:58	SMTP-OU	A51A416496164CEE933CA2C37B54900B.MAI	1476	142.250.102.26	EHLO	STARTTLS	220 2.0.0 Ready to start TLS	10	30	info	test email
08/23/21 05:57:58	SMTP-OU	A51A416496164CEE933CA2C37B54900B.MAI	1476	142.250.102.26	EHLO	EHLO webmail.manytechsolutions.co.uk	250-mx.google.com at your service, [77.68.3.217]	38	153	info	test email
08/23/21 05:57:58	SMTP-OU	A51A416496164CEE933CA2C37B54900B.MAI	1476	142.250.102.26	MAIL	MAIL FROM:<isender@serveremil.com> SIZE=940	250 2.1.0 OK x11si14193926edd.110 - gsmtp	44	43	info	test email
08/23/21 05:57:58	SMTP-OU	A51A416496164CEE933CA2C37B54900B.MAI	1476	142.250.102.26	RCPT	RCPT TO:<receiver@gmail.com>	250 2.1.5 OK x11si14193926edd.110 - gsmtp	32	43	info	test email
08/23/21 05:57:58	SMTP-OU	A51A416496164CEE933CA2C37B54900B.MAI	1476	142.250.102.26	DATA	DATA	354  Go ahead x11si14193926edd.110 - gsmtp	6	44	info	test email
As far as i can tell the email was sent without issue?
https://t.me/pump_upp

MudassarKhan
Posts: 7
Joined: Sat Aug 21, 2021 3:04 pm

Re: strange issue with sending emails - not received

Post by MudassarKhan »

also another point to note. Gmail emails i reply to only get through if i dont change the subject at all. otherwise they also fail to get through.
https://t.me/pump_upp

MailEnable-Ian
Site Admin
Posts: 9738
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: strange issue with sending emails - not received

Post by MailEnable-Ian »

Hi,

In your log snippet it gets to the DATA command where data is transmitted. You need to inspect the associated SMTP debug log file for the same date time and search for the same message ID to see if there were errors during the data transmission.
Regards,

Ian Margarone
MailEnable Support

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