Linux Server Sendmail SMTP - Invalid HELO

I'm currently using PHP Mail function to send out emails.

However, some emails sent out are not being received by recipents.

Mail Queueing System from DirectAdmin says the following:



This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its

recipients. This is a permanent error. The following address(es) failed:

tom{at}[url removed, login to view]

SMTP error from remote mail server after MAIL FROM:<admin{at}[url removed, login to view] > SIZE=1836:

host [url removed, login to view] [[url removed, login to view]]: 550 Access denied - Invalid HELO name (See RFC2821


This needs to be fixed. I suspect something wrong with hostname configuration.

Urgent Job, Budget $30.

Beceriler: Linux, Betik Yükleme, Kabuk Betiği, Sistem Yöneticisi, Web Güvenliği

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İşveren Hakkında:
( 148 değerlendirme ) Brisbane, Australia

Proje NO: #726142



hello, I'm interested in your project and I can fix that. I'm ready to start right away. Kindly regards.

%selectedBids___i_period_sub_7% gün içinde 30%project_currencyDetails_sign_sub_9% %project_currencyDetails_code_sub_10%
(6 Değerlendirme)

Bu iş için 5 freelancer ortalamada $34 teklif veriyor


Hi. Please check PM. Thanks.

1 gün içinde %bids___i_sum_sub_32%%project_currencyDetails_sign_sub_33% USD
(19 Değerlendirme)

Let's start!

in %bids___i_period_sub_35% gün içinde30%project_currencyDetails_sign_sub_37% %project_currencyDetails_code_sub_38%
(30 Değerlendirme)

===================================================HI, Please check PM====================================================

in %bids___i_period_sub_35% gün içinde30%project_currencyDetails_sign_sub_37% %project_currencyDetails_code_sub_38%
(3 Değerlendirme)

Know exactly what the issue is, ready to have it resolved.

1 gün içinde %bids___i_sum_sub_32%%project_currencyDetails_sign_sub_33% USD
(0 Değerlendirme)