www 1072865 0.0 0.0 115180 8332 ? S 09:13 0:00 /usr/sbin/sendmail -t -i www 1072866 0.0 0.0 115168 8768 ? S 09:13 0:00 /usr/sbin/postdrop -r www 1072869 0.0 0.0 115180 8664 ? S 09:13 0:00 /usr/sbin/sendmail -t -i www 1072870 0.0 0.0 115168 8592 ? S 09:13 0:00 /usr/sbin/postdrop -r www 1072980 0.0 0.0 115180 8568 ? S 09:16 0:00 /usr/sbin/sendmail -t -i www 1072981 0.0 0.0 115168 8648 ? S 09:16 0:00 /usr/sbin/postdrop -r www 1074040 0.0 0.0 115180 8712 ? S 09:23 0:00 /usr/sbin/sendmail -t -i www 1074041 0.0 0.0 115168 8760 ? S 09:23 0:00 /usr/sbin/postdrop -r www 1074491 0.0 0.0 115180 8604 ? S 09:25 0:00 /usr/sbin/sendmail -t -i www 1074492 0.0 0.0 115168 8768 ? S 09:25 0:00 /usr/sbin/postdrop -r I have made a new clean wordpress install, tried to reset password, and nothing works when trying to do such. In console on ps aux I can see the above processes. Thats all there is visible.

check your firewall, some server provider default blocked sendmail function (e.g. port 25)

I have no extra firewall functions deployed.

And my dedicated servers are not locked.

test your sendmail on ssh echo "Subject: sendmail test" | sendmail -v your@email.com

[root@apa centos]# echo "Subject: sendmail test" | sendmail -v cosmin@uhlhost.net postdrop: warning: mail_queue_enter: create file maildrop/652695.1169380: No such file or directory postdrop: warning: mail_queue_enter: create file maildrop/653160.1169380: No such file or directory

try kill postdrop and sendmail process kill -9 $(ps -auwx | grep postdrop | gawk -F' ' '{print $2}') kill -9 $(ps -auwx | grep sendmail | gawk -F' ' '{print $2}') restart postdrop and sendmail service postdrop start service sendmail start

Very weird behaviours: [root@apa centos]# service postdrop start Redirecting to /bin/systemctl start postdrop.service Failed to start postdrop.service: Unit postdrop.service not found. [root@apa centos]# service sendmail start Redirecting to /bin/systemctl start sendmail.service Failed to start sendmail.service: Unit sendmail.service not found. [root@apa centos]#

it seems there is some issues on amavis cant start.

[deleted] Have you tried reinstalling it?

Wordpress sendmail not working LEMP.

[deleted]

aaPanel_Jose no, i will.

[deleted]

aaPanel_Jose i have reinstalled it, still my nginx returns a 502 error to this. And Its not much in console log either.

94.112.41.18 - - [27/Aug/2020:17:09:28 +0200] "GET /wp-login.php?action=lostpassword HTTP/2.0" 200 1184 "https://staging.uhl.site/wp-login.php?redirect_to=https%3A%2F%2Fstaging.uhl.site%2Fwp-admin%2Fsite-health.php%3Ftab%3Ddebug&reauth=1" "Mozilla/5.0 (Macintosh; Intel Mac OS X 11_0) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0 Safari/605.1.15"
94.112.41.18 - - [27/Aug/2020:17:09:32 +0200] "POST /wp-login.php?action=lostpassword HTTP/2.0" 499 0 "https://staging.uhl.site/wp-login.php?action=lostpassword" "Mozilla/5.0 (Macintosh; Intel Mac OS X 11_0) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0 Safari/605.1.15"
94.112.41.18 - - [27/Aug/2020:17:11:16 +0200] "POST /wp-login.php?action=lostpassword HTTP/2.0" 502 150 "https://staging.uhl.site/wp-login.php?action=lostpassword" "Mozilla/5.0 (Macintosh; Intel Mac OS X 11_0) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.0 Safari/605.1.15"

idflorin

Just seen this post and I made a test with my contact form. I tried to send a message using the contact form.
Surprise 😅 I received a nice "502 Bad Gateway Nginx"
and this error:

2020/08/27 20:14:59 [error] 13902#0: *124840 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 109.99.64.83, server: spare-wheel.com, request: "POST /contact HTTP/2.0", upstream: "fastcgi://unix:/tmp/php-cgi-74.sock:", host: "www.spare-wheel.com", referrer: "https://www.spare-wheel.com/contact"

help, please

[deleted]

I believe this is a issue on nginx side yet not sure about this yet. Maybe aaPanel_Jose can help us.

idflorin

A server reboot fixed my issue. At least for now.

aaPanel_Jose

idflorin
Have you tried to increase the number of child processes in the php manager?

idflorin

aaPanel_Jose my curent settings in php 7.4

anyway, now it's working

[deleted]

Not woeking for us. Tried reboot. Increased nr of childs.

idflorin

It's happening again "502 Bad Gateway Nginx" on the contact form. Restart Nginx, Restart Php 7.4. No effect.
Restart VPS => "Your message has been sent." Restarting the VPS is not a solution.

[deleted]

@aaPanel_Jose any ideas on troubleshooting and solving this issue? Emails are a must no matter server type.

idflorin

[deleted] For me restarting the VPS solves the problem for a time. I'll keep testing to see how much time.

aaPanel_Jose

idflorin
please try to change /www/server/php/74/etc/php-fpm.conf and restart php

request_terminate_timeout = 100
to
request_terminate_timeout = 0

idflorin

aaPanel_Jose

Log in and test. Error is present after total VPS reboot. It was working fine for just about 2 hours after VPS reboot.
Made the change request_terminate_timeout = 0 I restarted the PHP but the error is still present.
504 Gateway Time-out
Rebooted Nginx and Php = the error is still present.
504 Gateway Time-out
Error from PHP log:
2020/09/03 15:00:46 [error] 32236#0: *40509 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 109.103.221.35, server: electrichunter.com, request: "POST /contact HTTP/2.0", upstream: "fastcgi://unix:/tmp/php-cgi-74.sock", host: "www.electrichunter.com", referrer: "https://www.electrichunter.com/contact"
VPS reboot => "Your message has been sent."

idflorin

I have on this VPS Nginx 1.19.2 it's safe to downgrade to 1.17?

[deleted]

@aaPanel_Jose still no fix to this?

idflorin

[deleted] 18 hour later after request_terminate_timeout = 0 + VPS reboot, Sendmail still works. I'll monitor this further and get back with feedback.

ruslan

facing same problem, changing request_terminate_timeout didnt help

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