==== Required information ====
- iRedMail version: 0.8.7
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): LDAP
- Linux/BSD distribution name and version: CentOS 6.5
- Related log if you're reporting an issue: maillog:Sep 26 09:59:55 mail2 postfix/smtp[18304]: 258033605FB: to=<emailadrress@externaldomain.com>, relay=envmx.etransmail.com[202.162.242.175]:25, delay=39, delays=0.08/0.02/38/0.32, dsn=5.7.1, status=bounced (host envmx.etransmail.com[202.162.242.175] said: 554 5.7.1 <emailadrress@externaldomain.com>: Recipient address rejected: Access denied (in reply to RCPT TO command))
====
Sending mail to this particular domain gets bounced with the below error message.
maillog:Sep 26 09:59:55 mail2 postfix/smtp[18304]: 258033605FB: to=<emailadrress@externaldomain.com>, relay=envmx.etransmail.com[202.162.242.175]:25, delay=39, delays=0.08/0.02/38/0.32, dsn=5.7.1, status=bounced (host envmx.etransmail.com[202.162.242.175] said: 554 5.7.1 <emailadrress@externaldomain.com>: Recipient address rejected: Access denied (in reply to RCPT TO command))
Until yesterday there was no problem sending mails to this domain,
maillog:Sep 25 14:59:36 mail2 postfix/smtp[11227]: BDF5E360511: to=<emailadrress@externaldomain.com>, relay=nsmtpinpn1.axisbank.com[115.111.211.189]:25, delay=12, delays=0.08/0.02/3.5/8.1, dsn=2.0.0, status=sent (250 2.0.0 OK DF/DE-02561-DCFD3245)
Searched the forum and Google for a solution but unable to find a relevant answer to this kind of problem. Please help me out.