[3.3.x] Support Forum • SMTP not working (Response: 501 Error: Syntax: HELO hostname)

I use mailersend as SMTP. This worked fine with MyBB but not with phpBB.

My settings are as follow:
Server address: smtp.mailersend.net
Server port: 587
Authentication method: LOGIN (not specified by mailersend)
Username: username@arcproject.lol
Password: xxxx
Verify SSL: yes
Verify SMTP peer name: yes
Allow self-singed: no

The info (address, port, username, password) is correct, on mailersend it says the connection method is TLS. Mailersend did not provide an authentication method. The From is admin@arcproject.lol

Email error
» EMAIL/SMTP
/adm/index.php?i=acp_board&sid=94308181042e8c0fae531896190c13b0&mode=email

Ran into problems sending email at Line 1567. Response: 501 Error: Syntax: HELO hostname
.
Backtrace
Connecting to smtp.mailersend.net:587
LINE: 1210 <- 220 smtp.mailersend.net ESMTP

# EHLO
LINE: 1557 <- 501 Error: syntax: EHLO hostname

# HELO
LINE: 1567 <- 501 Error: Syntax: HELO hostname

Statistics: Posted by nerfcats — Sun Nov 17, 2024 2:59 am

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