Xenforo Not confirming emails? is it getting blocked?

Has the Sendgrid configured SMTP for forum emails ever worked ? Worked but just started not working ? Or never worked at all ? As per https://sendgrid.com/docs/for-developers/sending-email/getting-started-smtp/ make sure you have the right settings for Sendgrid which are for TLS on ports 25, 587 and 2525 or SSL on port 465.

Example



Centmin Mod uses CSF Firewall to protect the server with whitelisted ports added in custom port list for TCP_IN/TCP_OUT and TCP6_IN and TCP6_OUT comma separated list of ports in CSF Firewall config file at /etc/csf/csf.conf.

You can edit, add or remove ports you require and then restart CSF Firewall service for it to take effect. You can see a list of default Centmin Mod CSF Firewall handled ports at CSF - Centmin Mod LEMP stack CSF Firewall default port listing.

In SSH you can type this command to have a quick overview of existing ports for the respective variables. TCP_OUT and TCP6_OUT should already have ports 465 and 587 whitelisted which you can check

Code (Text):

egrep '^TCP_|^TCP6_|^UDP_|^UDP6_' /etc/csf/csf.conf

Output will be a comma separated list of port numbers that are white listed by CSF Firewall

Code (Text):

TCP_IN =
TCP_OUT =
UDP_IN =
UDP_OUT =
TCP6_IN =
TCP6_OUT =
UDP6_IN =
UDP6_OUT =

To restart CSF Firewall

Code (Text):

csf -r

 

Who is the web host and plan you're on ? What type of VPS server ? virtualization used ? OpenVZ, KVM, Xen, VMWare ?

output for

Code (Text):

virt-what

and

Code (Text):

perl /etc/csf/csftest.pl

example of good output indicating CSF Firewall and iptables will work properly

Code (Text):

perl /etc/csf/csftest.pl
Testing ip_tables/iptable_filter...OK
Testing ipt_LOG...OK
Testing ipt_multiport/xt_multiport...OK
Testing ipt_REJECT...OK
Testing ipt_state/xt_state...OK
Testing ipt_limit/xt_limit...OK
Testing ipt_recent...OK
Testing xt_connlimit...OK
Testing ipt_owner/xt_owner...OK
Testing iptable_nat/ipt_REDIRECT...OK
Testing iptable_nat/ipt_DNAT...OK
RESULT: csf should function on this server