The letter is Washington’s highest-level outreach to Tehran in months, according to Axios, and comes as Trump considers resuming strikes after the US midterms.
There were concerns ahead of Sunday's meeting in Tehran that Israeli Prime Minister Netanyahu could resume attacks on the Islamic Republic this week, the official added.
Qatar urged Iran to reopen the Strait of Hormuz and halt threats against Gulf states, saying Tehran must demonstrate goodwill for mediation efforts to succeed.
Tehran has sought to tighten its grip on the strategic waterway by attacking shipping there since US and Israeli airstrikes on Iran on February 28.
State media said Khamenei had stressed the importance of pursuing Iran's interests and maintaining its conditions for ending the war.
Authorities closed the al-Shib crossing last week as they upgraded security and detection equipment, an Iraqi official told Reuters on Wednesday.
Hezbollah has remained committed to attacking Israel and has used a lull in hostilities since June to rearm, with a focus on procuring explosives and drones that can be used to attack IDF troops.
Putin will meet the Iranian President and Emir of Qatar after hosting leaders of a Gas Exporting Countries Forum in Moscow.
The dispute comes amid tensions between Baghdad and Tehran and renewed protests in the Iraqi capital marking the anniversary of the 2019 Tishreen movement.
Authorities closed the crossing last week as they upgraded security and detection equipment, an Iraqi official told Reuters on Wednesday.
He also said that the meeting with the Mecca pact members in Tehran would tackle issues such as Israel's 'expansionist' policies, Lebanon, and the US war with Iran.
