Invalid email message

[nbhanji]

Hi,
When I try to send an email that has + sign, I am unable to send a test email. I get an error - Invalid email address. I have tried sending email using thunderbird and gmail, and am successful. Attaching a image to see if anyone has run into this and how it is solved.

Thanks in advance
nb

[dimir]

Zabbix is using standard PHP function filter_var with constant FILTER_VALIDATE_EMAIL which conforms to RFC5321 that says

4.5.3.1.1. Local-part

The maximum total length of a user name or other local-part is 64
octets.
​

So, the error message is not there because of plus symbols but because it's just breaking the RFC that says the username part (the left-side of the @) cannot be longer than 64 symbols.

What I can think of is you could use mail aliases to overcome this.

[dimir]

What Zabbix version? How long is the e-mail address part before @? I tested it here and could get this error when it was 64 and more symbols.

[nbhanji]

zabbix_server (Zabbix) 6.0.8
Revision c7c3044a4a2 29 August 2022, compilation time: Aug 29 2022 07:33:19

Copyright (C) 2022 Zabbix SIA
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it according to
the license. There is NO WARRANTY, to the extent permitted by law.

This product includes software developed by the OpenSSL Project
for use in the OpenSSL Toolkit (http://www.openssl.org/).

Compiled with OpenSSL 1.1.1f 31 Mar 2020
Running with OpenSSL 1.1.1f 31 Mar 2020


Number of characters is 79, the string is formed as "zchat+client-zabbix-notifications.<32 chars of HEX>.show-finder"@<domain>.com

[dimir]

Zabbix is using standard PHP function filter_var with constant FILTER_VALIDATE_EMAIL which conforms to RFC5321 that says

4.5.3.1.1. Local-part

The maximum total length of a user name or other local-part is 64
octets.
​

So, the error message is not there because of plus symbols but because it's just breaking the RFC that says the username part (the left-side of the @) cannot be longer than 64 symbols.

What I can think of is you could use mail aliases to overcome this.

[nbhanji]

Thank you. I actually ended up going through the source and saw what you referenced. So I did use the shorter name email address. Thank you for your help.